| File extension | Developer/Producer | File description |
|---|---|---|
| $$M file extension | Conitec Datasystems, Inc | 3D GameStudio Backup Map |
| $1 file extension | N/A | ZX Spectrum HOBETA Format |
| 0 file extension | M3 | Nintendo M3 DS Real Save Format |
| 00 file extension | The Ur-Quan Masters | Ur-Quan Masters Saved Game Format |
| 001 file extension | The Snes9x Team | Snes9x Slot 2 Game Saved Format |
| 007 file extension | Electronic Arts, Inc. | James Bond 007: Nightfire Game Format |
| 01 file extension | Electronic Arts, Inc. | FIFA 2001 User |
| 016 file extension | Electronic Arts, Inc. | Formula 1 2001 Car Race Game |
| 11 file extension | Ubisoft Entertainment S.A. | Salt Lake Winter Olympics 2002 Music |
| 12 file extension | Ubisoft Entertainment S.A. | Salt Lake Winter Olympics 2002 Game Music |
| 13 file extension | Ubisoft Entertainment S.A. | Salt Lake Winter Olympics 2002 Game Music |
| 14 file extension | Ubisoft Entertainment S.A. | Salt Lake Winter Olympics 2002 Music Game |
| 15 file extension | Ubisoft Entertainment S.A. | Saltlake City Game Music |
| 18 file extension | Ubisoft Entertainment S.A. | Salt Lake Game Music |
| 19 file extension | Ubisoft Entertainment S.A. | Salt Lake Winter Olympics 2002 Music Game |
| 2 file extension | N/A | Super Nintendo Split ROM Image |
| 20 file extension | Ubisoft Entertainment S.A. | Salt Lake City Game Music |
| 21 file extension | Ubisoft Entertainment S.A. | Salt Lake City Game Music |
| 21W file extension | WOM Games | Snood Preferences |
| 25 file extension | Ubisoft Entertainment S.A. | Saltlake City Game Music |
| 28 file extension | Ubisoft Entertainment S.A. | Salt Lake Winter Olympics 2002 Music Game |
| 2DA file extension | BioWare | BioWare Aurora Engine 2-dimensional Array |
| 2DS file extension | N/A | Unreal Tournament 2D Shape |
| 32 file extension | Ubisoft Entertainment S.A. | Salt Lake Winter Olympics 2002 Music Game |
| 32X file extension | N/A | Sega GENESIS ROM Image Format |
| 34 file extension | Ubisoft Entertainment S.A. | Salt Lake Winter Olympics 2002 Audio Game |
| 36 file extension | Ubisoft Entertainment S.A. | Salt Lake City Game Music |
| 37 file extension | Ubisoft Entertainment S.A. | Salt Lake Winter Olympics 2002 Audio Game |
| 3D0 file extension | Sierra Entertainment, Inc. | Grand Prix Legends Track |
| 3DI file extension | NovaLogic, Inc. | Delta Force Object Collection |
| 3DO file extension | Cavedog Entertainment | Total Annihilation Object |
| 3DOKU file extension | Simone Tellini | 3Doku Game |
| 4 file extension | Ubisoft Entertainment S.A. | Salt Lake City Game Music |
| 42 file extension | Ubisoft Entertainment S.A. | Salt Lake Winter Olympics 2002 Game Audio |
| 45 file extension | Ubisoft Entertainment S.A. | Salt Lake Winter Olympics 2002 Music Game |
| 49 file extension | Ubisoft Entertainment S.A. | Salt Lake City Game Music |
| 555 file extension | Lionhead Studios | Black & White Weather Settings Format |
| 6 file extension | Ubisoft Entertainment S.A. | Salt Lake Winter Olympics 2002 Music |
| 7 file extension | Trilobyte, Inc. | The 7th Guest |
| 8LD file extension | Triumph Studios | Overlord 2 Language Format |
| 9 file extension | Ubisoft Entertainment S.A. | Salt Lake City Game Music |
| 9KP file extension | id Software LLC | Doom Archived TGA Graphics |
| A26 file extension | N/A | Atari 2600 ROM Image Format |
| A52 file extension | N/A | Atari 5200 Game Image Format |
| A78 file extension | N/A | Atari 7800 Image |
| AAO file extension | US Army | Americas Army Map Format |
| AAS file extension | Raven Software | Star Trek Elite Force Bot Support |
| ABG file extension | Electronic Arts, Inc. | FIFA World Cup Game Data Beart |
| ABK file extension | Electronic Arts | Need For Speed Audio Format |
| ABS file extension | AB SuDoKu | AB SuDoKu Saved Game |
| ABZ file extension | Mark Mullin | AbszOrb 3D Interactive Game |
| ACX file extension | Atari | Atari ST Program Format |
| ADDR file extension | Ymir Entertainment Co., Ltd. | Metin2 Data |
| ADL file extension | N/A | Nova Logic Game Animation Data Batch Listing |
| ADT file extension | Blizzard Entertainment | World Of Warcraft Map Format |
| AFL file extension | Laminar Research | X-Plane |
| AGB file extension | N/A | Game Boy Advance ROM |
| AGE3REC file extension | Microsoft Studios | Age Of Empires III Recorded Game |
| AGE3SAV file extension | Microsoft Studios | Age Of Empires III Save Game |
| AGE3SCN file extension | Microsoft | Age Of Empires III Scenario Format |
| AGE3XREC file extension | Microsoft Studios | Age Of Empires III: The WarChiefs Recorded |
| AGE3XSAV file extension | Microsoft Studios | Age Of Empires III: The WarChiefs Save Game |
| AGE3XSCN file extension | Microsoft Studios | Age Of Empires III: The WarChiefs Scenario |
| AGE3YREC file extension | Microsoft Studios | Age Of Empires III: The Asian Dynasties Recorded Game |
| AGE3YSAV file extension | Microsoft Studios | Age Of Empires III: The Asian Dynasties Save Game |
| AGE3YSCN file extension | Microsoft Studios | Age Of Empires III: The Asian Dynasties Scenario |
| AGS file extension | Capcom Co., Ltd. | Street Fighter IV Game Font |
| AHC file extension | Capcom Co., Ltd. | Resident Evil 4 |
| AHF file extension | N/A | Aces High Film |
| AHOD file extension | Relic Entertainment Inc. | Homeworld |
| AID file extension | Activision | Star Trek Armada Arficicial Intelligence Parameters |
| AIRPORT file extension | Knife Edge Software | RealFlight Simulator |
| AIW file extension | Sony Corporation | Formula One 2001 Game |
| ALA file extension | Michael Arnaud | Alan Interactive Fiction Language |
| ALO file extension | LucasArts Entertainment Company, LLC | Star Wars: Empire At War Game |
| ALR file extension | Campbell Wild | ADRIFT Language Resource Format |
| AM1 file extension | The Adventure Maker Team | Adventure Maker Project Format |
| AMA file extension | Electronic Arts, Inc. | Fifa2000 Feart |
| AMT file extension | System SoftLab | ArtMoney Table |
| AN2 file extension | Argonaut Software | Croc Animation Format |
| AR file extension | Microsoft | Midtown Madness City Add-on Format |
| ARC file extension | Activision | Cabelas African Safari Data Format |
| ARCH00 file extension | Sierra | F.E.A.R. Game Archive Format |
| ARCH01 file extension | Monolith Productions, Inc. | F.E.A.R. 2 Game |
| ARCHCFG file extension | Monolith Productions, Inc. | F.E.A.R. 2 Project Origin Configuration |
| ARE file extension | BioWare | BioWare Aurora Engine Area |
| ARENA file extension | id Software | Quake 3 Id Tech 3 Game Engine Arena Settings Format |
| ARLC file extension | Eidos Interactive Ltd. | Commandos 2 Men Of Courage Game |
| ARM file extension | Terminal Reality | Fly! Articulated Model |
| ARMA2OAPROFILE file extension | Bohemia Interactive | ArmA 2 Settings |
| ARMA2PROFILE file extension | Bohemia Interactive | ARMA2 Profile |
| ARMY file extension | Microsoft Studios | Impossible Creatures Collection Of Created Creatures |
| ARS file extension | Stainless Games | Carmageddon Saved Game |
| ARZ file extension | THQ | Titan Quest Game Database |
| ASG file extension | Global Star Software | Airport Tycoon Saved Game |
| ASH file extension | Audiosurf | Audiosurf Audio Metadata Format |
| ASSET file extension | Unity Technologies | Unity Asset Format |
| ASSTRM file extension | Ubisoft Entertainment S.A. | Splinter Cell Blacklist Game Data |
| ATLAS file extension | Firefly Studios Ltd. | Stronghold 3 Editor |
| ATM file extension | Sony | PSP Game Audio Format |
| AUR file extension | Andrew Gryc | AutoREALM Map |
| AZP file extension | Atomic Games, Inc. | Close Combat Effect |
| B!K file extension | Microsoft Studios | Microsoft Flight Simulator Scenery |
| B&W file extension | Rockstar Games, Inc. | Grand Theft Auto III Save |
| BAG file extension | Electronic Arts, Inc. | Emperor: Battle For Dune Game |
| BAR file extension | Microsoft | Age Of Empires / Age Of Mythology Game Format |
| BATCH file extension | Sierra Entertainment, Inc. | Switchball Game Data |
| BB3 file extension | WildTangent | BlasterBall 3 Level Format |
| BBG file extension | CyberSports, Inc. | CyberSports For Basketball Game |
| BBRKPUZZLE file extension | Juan Trujillo | Puzzle |
| BBRKSAVE file extension | Juan Trujillo | Puzzle Started Status |
| BD1 file extension | team MITEI | Map Block Location |
| BDAE file extension | Gameloft | Gameloft Game Data Format |
| BDOF file extension | N/A | Mario Kart Mod Effect |
| BEJEWELED2DELUXESAVEDGAME file extension | Big Fish Games | Bejeweled 2 Deluxe Save Game Format |
| BEX file extension | N/A | BOOM Extensions To Dehacked |
| BFB file extension | Microsoft Studios | Zoo Tycoon 2 Game Model |
| BFFM file extension | Microprose | B-17 Flying Fortress: The Mighty 8th Game |
| BFG file extension | Big Fish Games | Mario Kart Mod Effect Format |
| BFL file extension | Codemasters | Colin McRae Rally 2 Game |
| BFM file extension | Terminal Reality | Terminal Reality Model Format |
| BFONT file extension | Electronic Arts, Inc. | Need For Speed SHIFT Font |
| BFS file extension | Bugbear Entertainment | SmartWare Backup Sort Definition Format |
| BGUI file extension | Electronic Arts, Inc. | Need For Speed SHIFT GUI |
| BGW file extension | SQUARE ENIX CO. | Final Fantasy Music |
| BGZ file extension | Wouter van Oortmerssen | Blood Frontier Map Format |
| BH3 file extension | Microsoft Studios | Rise Of Nations Unit Graphic |
| BHA file extension | Microsoft Studios | Rise Of Nations Unit Graphic |
| BIC file extension | N/A | Civilization III Game Scenario Format |
| BIG file extension | Electronic Arts | Electronic Arts Game Resource Package Format |
| BIK file extension | N/A | BINK Video Format |
| BIN file extension | N/A | Sega Genesis Game ROM |
| BINUI file extension | Ubisoft Entertainment S.A. | Call Of Juarez Game Menu |
| BIQ file extension | N/A | Civilization 3 Scenario Format |
| BIX file extension | N/A | Civilization III Scenario Format |
| BLACKHAWKSTRIKER2 file extension | WildTangent | Blackhawk Striker 2 Saved Game |
| BLACKHAWKSTRIKER2SAVEDGAME file extension | WildTangent, Inc. | Blackhawk Striker 2 Saved Game |
| BLASTERBALL2DRM3SAVEDGAME file extension | WildTangent, Inc. | Blasterball 2 Save Game |
| BLASTERBALL3SAVEDGAME file extension | WildTangent | Blasterball 3 Save Game Format |
| BLIGHT file extension | N/A | Mario Kart Mod Effect |
| BLP file extension | Blizzard Entertainment | Blizzard Game Texture Format |
| BLS file extension | Blockland | Blockland Saved Game |
| BLUE file extension | CCP | EVE Online Texture |
| BLV file extension | Ubisoft Entertainment S.A. | Might And Magic 6/7 Dungeon Level Geometry |
| BLY file extension | Electronic Arts, Inc. | FIFA World Cup Game Data Fe Art Load Game |
| BLZ file extension | Nokia | Nokia N-Gage Game Format |
| BMD file extension | WEBZEN | MU Online Game Data Format |
| BME file extension | Konami | Konami Beatmania Music Simulator Format |
| BMG file extension | Nintendo | Mario Kart Wii Message Format |
| BMQ file extension | Acclaim Games Inc. | Re-Volt Texture |
| BMS file extension | Konami | Beatmania Music Simulator Format |
| BMZ file extension | Valve | Portal Map Format |
| BNG file extension | The Bingo Maker Team | Bingo Maker Bingo Data Template Format |
| BNK file extension | Eden Games | Test Drive Unlimited Game Data Format |
| BNS file extension | Valve | Portal Script Format |
| BNT file extension | MindArk PE AB. | Entropia Universe Game Archive |
| BNZ file extension | The Bingo Maker Team | Bingo Maker Bingo Template Or Bingo List Update Format |
| BOBTHEBUILDERSAVEDGAME file extension | Brighter Minds Media | Bob The Builder: Can Do Zoo Save Game |
| BOD file extension | Egosoft | X3 Reunion Ship |
| BOH file extension | Paradox Interactive | Europa Universallis 2 Game Data |
| BOL file extension | Nintendo Co., Ltd. | Mario Kart Course Setup |
| BOOKWORMDELUXESAVEDGAME file extension | Big Fish Games | Bookworm Deluxe Saved Game |
| BOS file extension | Micro Forté | Fallout Tactics Game Archive |
| BOT file extension | Gabriel Interactive, Inc. | Robot Arena Game |
| BOXER file extension | N/A | Boxer For Mac Game Archive |
| BRASD file extension | N/A | Mario Kart Mod |
| BREFF file extension | Nintendo Co., Ltd. | Mario Kart Wii Animated Graphic |
| BREFT file extension | Nintendo Co., Ltd. | Mario Kart Wii Animated Graphic |
| BRFNT file extension | Nintendo Co., Ltd. | Mario Kart Wii Font |
| BRLYT file extension | N/A | Nintendo Wii Texture Settings Format |
| BRN file extension | Sierra Entertainment | Gabriel Knight Barn Format |
| BROGUESAVE file extension | Seth Howard | Brogue Saved Game |
| BRRES file extension | N/A | Wii BRRES Resource Package |
| BRSAR file extension | N/A | Wii BRSAR Audio Package |
| BRTEX file extension | N/A | Wii BRTEX Texture |
| BS1 file extension | VirtualBus | VirtualBus Format |
| BSA file extension | Bethesda Softworks | Bethesda Softworks Archive Format |
| BSB file extension | Take-Two Interactive Software | BioShock Saved Game Format |
| BSM file extension | 2K Games | Bioshock Map |
| BSP file extension | id Software | Quake 2 Map Format |
| BSPR file extension | Electronic Arts, Inc. | Need For Speed SHIFT Track Map |
| BTL file extension | Interactive Magic | American Civil War |
| BTY file extension | PopTop Software Inc. | Railroad Tycoon 3 Building |
| BUILDALOT2SAVEDGAME file extension | Big Fish Games | Build-a-lot 2 Save Game |
| BUILDALOT3SAVEDGAME file extension | Big Fish Games | Build-a-lot 3 Saved Game |
| BURNOUTPARADISESAVE file extension | Criterion Games | Burnout Paradise Saved Profile |
| BUS file extension | VirtualBus | VirtualBus Bus Route Settings Format |
| BVS file extension | BVS Development Corporation | BVS Solitaire Collection |
| BWD file extension | Codemasters | Colin McRae Rally 2 Car Description |
| BZN file extension | Activision | Star Trek Armada Map |
| BZW file extension | BZFlag.org | BZFlag Map Format |
| C16 file extension | CyberLife Technology Ltd. | C16 Creatures 3/Docking Station Image |
| C4F file extension | RedWolf Design GmbH | Clonk Game Round |
| C4G file extension | RedWolf Design GmbH | Clonk Game System |
| C4K file extension | RedWolf Design | Clonk Key Format |
| C4S file extension | RedWolf Design GmbH | Clonk Game Scenario |
| C4U file extension | Open Clonk Development team | OpenClonk Update System |
| C4V file extension | RedWolf Design GmbH | Clonk Game Video |
| C64 file extension | N/A | Commodore 64 ROM Image |
| CANIM file extension | Klei Entertainment Inc. | Shank Game |
| CARC file extension | Nintendo | Nintendo DS Compressed Archive Format |
| CARD file extension | RealArcade.com | Funkiball Adventure |
| CBF file extension | ChessBase | ChessBase Game Information Format |
| CBH file extension | ChessBase | ChessBase Chess Database Format |
| CBS file extension | Pelican Accessories | Code Breaker PS2 Save Format |
| CBV file extension | ChessBase | ChessBase Archive Format |
| CCW file extension | WordWeb Software | Crossword Compiler Saved Puzzle |
| CDATA file extension | Electronic Arts, Inc. | Command & Conquer 3 Audio |
| CDMEDIA file extension | N/A | Boxer For Mac Cd-rom |
| CDP file extension | N3V Games | Trainz Simulator Content Dispatcher Pack Format |
| CDP2 file extension | N3V Games | Trainz Classics Content Dispatcher Pack 2 Format |
| CEM file extension | Tilted Mill Entertainment | Children Of The Nile Model Format |
| CFGE file extension | iWin | Jewel Quest Configuration Format |
| CFR file extension | Z8Games | Cross Fire Replay Format |
| CFREPLAY file extension | SmileGate | Crossfire Europe Replay |
| CGF file extension | Ubisoft | Far Cry 3D Model Format |
| CGO file extension | PopTop Software Inc. | Railroad Tycoon 3 Car Properties |
| CGZ file extension | Rabid Viper Productions | AssaultCube Map Format |
| CHD file extension | The MAME Team | MAME Compressed Hard Disk Format |
| CHESSTITANSSAVE-MS file extension | Microsoft | Chess Titans Save Game Format |
| CHK file extension | Blizzard Entertainment | Starcraft Campaign Map Format |
| CHT file extension | N/A | ZSNES Cheat Code Format |
| CIM file extension | Electronic Arts, Inc. | SimCity 2000 |
| CIV file extension | Activision Blizzard, Inc. | Empire Earth Custom Civilization Information |
| CIV5MAP file extension | Firaxis Games | Civilization 5 Map |
| CIV5SAVE file extension | Take-Two Interactive Software | Civilization 5 Saved Game Format |
| CK1 file extension | id Software LLC | Commander Keen 1 Game Data |
| CK2 file extension | id Software LLC | Commander Keen 2 Game Data |
| CK3 file extension | id Software LLC | Commander Keen 3 Game Data |
| CK4 file extension | id Software LLC | Commander Keen 4 Game Data |
| CK5 file extension | id Software LLC | Commander Keen 5 Game Data |
| CK6 file extension | id Software LLC | Commander Keen 6 Game Data |
| CLR0 file extension | N/A | Nintendo Wii Color Swapping Animation |
| CLT file extension | VisualBoyAdvance | VisualBoyAdvance Cheat List Format |
| CLU file extension | Revolution Software | Broken Sword 2 Dialogue |
| CLZ file extension | Core Design | Tomb Raider: The Angel Of Darkness Game |
| CM file extension | Rockstar Games | Grand Theft Auto CLEO Custom Mission Format |
| CME file extension | Viva Media | Crazy Machines Level Format |
| CMG file extension | Ubisoft Entertainment S.A. | ChessMaster Saved Game |
| CMI file extension | LucasArts Entertainment Company, LLC | The Dig Bundle |
| CNC3CAMPAIGN file extension | Electronic Arts, Inc. | Command And Conquer 3 Campaign Save Game |
| CNS file extension | Elecbyte | M.U.G.E.N. Character States Format |
| COK file extension | Eidos Interactive Ltd. | Carmageddon Patch |
| COL file extension | Rockstar Games | Grand Theft Auto III Collision Data Format |
| COMFYCAKESSAVE-MS file extension | Microsoft | Comfy Cakes Saved Game Format |
| CON file extension | Electronic Arts | Battlefield 1942 Configuration Format |
| COS file extension | Creature Labs | Creatures Source Code Format |
| COW file extension | Eidos Interactive Ltd. | Thief Game |
| CP2 file extension | ChessBase GmbH | ChessBase Theme Classification |
| CPG file extension | Blizzard Entertainment | StarCraft Campaign Format |
| CPK file extension | CRI Middleware | CRI Middleware Package |
| CPN file extension | Microsoft | Age Of Empires Campaign Format |
| CPX file extension | Microsoft | Rise Of Rome Campaign Format |
| CRAFT file extension | Squad | KSP Spacecraft Format |
| CRS file extension | StepMania | StepMania Course Format |
| CRYSISJMSF file extension | Crytek | Crysis Saved Game Format |
| CRYSISPSF file extension | Crytek | Crysis Warhead Saved Game Position Format |
| CS file extension | Rockstar Games | CLEO 3 Custom Script Format |
| CS2 file extension | CyberStep | CyberStep2 |
| CSB file extension | Capcom Co., Ltd. | Street Fighter IV Sound |
| CSC file extension | ValuSoft | 18 Wheels Of Steel: Pedal To The Metal Game |
| CT file extension | Cheat Engine | Cheat Engine Cheat Table Format |
| CTM file extension | LucasArts | Star Wars Republic Commando Map Format |
| CTY file extension | Maxis | SimCity City Format |
| CVM file extension | ATLUS | Odin Sphere |
| CW3 file extension | Insight Software Solutions, Inc. | Crossword Construction Kit Puzzle Group |
| CXARCHIVE file extension | CodeWeavers Inc. | CrossOver Bottle |
| CYR file extension | CRYTEK | Crysis Level |
| D02 file extension | Atari, Inc. | Fahrenheit Game |
| D03 file extension | Atari, Inc. | Fahrenheit Game |
| D2H file extension | N/A | Diablo II Hack It Module |
| D2I file extension | Hakai no Tenshi | ATMA Diablo II |
| D2P file extension | Blizzard Entertainment, Inc. | Diablo 2 Packet |
| D2S file extension | Blizzard Entertainment | Diablo II Saved Map Seed Data Format |
| D2X file extension | Blizzard Entertainment, Inc. | Diablo 2 Stash |
| D3C file extension | Interplay Entertainment Corporation | Descent |
| D3DBSP file extension | Activision | Call Of Duty Modern Warfare 2 Map Format |
| D3M file extension | Interplay Entertainment Corporation | Descent Game |
| D67 file extension | VICE | VICE Disk Image |
| D71 file extension | N/A | Commodore Emulator |
| D80 file extension | N/A | Commodore CBM-8050 Diskette Emulator Image |
| D81 file extension | N/A | Commodore VC-1581 Diskette Emulator Image |
| D82 file extension | N/A | Commodore Emulator |
| DA1 file extension | Microprose | Star Trek Generations Saved Game |
| DA3 file extension | Microprose | Star Trek Generations Saved Game |
| DA4 file extension | Microprose | Star Trek Generations Saved Game |
| DA5 file extension | Microprose | Star Trek Generations Saved Game |
| DA6 file extension | Microprose | Star Trek Generations Saved Game |
| DA7 file extension | Microprose | Star Trek Generations Saved Game |
| DA8 file extension | Microprose | Star Trek: Generations Saved Game |
| DA9 file extension | Microprose | Star Trek Generations Autosave Game |
| DAT file extension | Mojang Specifications | Minecraft Data Format |
| DAT_MCR file extension | Mojang | Minecraft Backup Format |
| DAT_NEW file extension | Mojang | Minecraft Level Format |
| DAT_OLD file extension | Mojang | Minecraft Backup Format |
| DAY file extension | BrainBox Games | Day Of The Zombie Map Format |
| DAYZPROFILE file extension | Bohemia Interactive | DAYZ Profile |
| DAZIP file extension | BioWare | Dragon Age Origins Game Format |
| DB file extension | GSC Game World | S.T.A.L.K.E.R. X-Ray Engine Database Format |
| DB0 file extension | GSC Game World | S.T.A.L.K.E.R. Game |
| DB4 file extension | GSC Game World | S.T.A.L.K.E.R. Game |
| DB5 file extension | GSC Game World | S.T.A.L.K.E.R. Game |
| DB6 file extension | GSC Game World | S.T.A.L.K.E.R. Game |
| DB7 file extension | GSC Game World | S.T.A.L.K.E.R. Game |
| DB8 file extension | GSC Game World | S.T.A.L.K.E.R. Game |
| DB9 file extension | GSC Game World | S.T.A.L.K.E.R. Game |
| DBI file extension | Electronic Arts, Inc. | FIFA World Cup Game Data Comin Fe |
| DBPF file extension | N/A | Maxis Database Packed Format |
| DC6 file extension | Blizzard Entertainment, Inc. | Diablo 2 Static Image |
| DCC file extension | Blizzard Entertainment, Inc. | Diablo 2 Animation |
| DCG file extension | N/A | HSFX Map |
| DD2 file extension | ProFantasy Software Ltd | Dungeon Designer 2 Map Design |
| DD3 file extension | Games Workshop Group PLC | Blood Bowl Game |
| DDJ file extension | Joymax Co., Ltd. | Silkroad Alchemy Page |
| DDPOKERSAVE file extension | Donohoe Digital LLC | DD Poker Save Game |
| DDSX file extension | Firefly Studios Ltd. | Stronghold Kingdoms Data |
| DDT file extension | Sports Interactive | Football Manager Player Club And Nations Format |
| DEM file extension | N/A | Recorded Game Format |
| DESC file extension | Electronic Arts | Description Format |
| DESS file extension | Microsoft Corporation | Microsoft Device Emulator Saved State |
| DGZ file extension | N/A | Dega Saved State |
| DHF file extension | N/A | AMIGA Emulator Disk Image ROM |
| DIE file extension | Blizzard Entertainment, Inc. | Diablo Item |
| DIF file extension | The MAME Team | MAME CHD Diff Format |
| DINERDASH2SAVEDGAME file extension | Playfirst | Diner Dash 2 Saved Game |
| DINERDASHSAVEDGAME file extension | Playfirst | Diner Dash Saved Game |
| DIVA file extension | SEGA | Project DIVA Song Format |
| DJS file extension | Electronic Arts, Inc. | NASCAR Thunder 2004 Game Music |
| DKD file extension | Ellipse Studios | Submarine Titans Battle Map |
| DL file extension | Microsoft | Zoo Tycoon 2 Game Format |
| DLLS file extension | N/A | UFO: Alien Invasion Plugin |
| DM2 file extension | id Software | Quake II Recorded Game Format |
| DM3 file extension | id Software | Quake 3 Arena Demo Format |
| DMO file extension | Apogee Software | Demo Format |
| DMS file extension | N/A | Dream Maker Script Format |
| DM_1 file extension | Activision | Call Of Duty Demo |
| DM_57 file extension | id Software LLC | Return To Castle Wolfenstein Demo |
| DM_68 file extension | id Software | Quake 3 Demo Format |
| DM_82 file extension | Splash Damage | Wolfenstein Enemy Territory Demo Format |
| DM_83 file extension | Splash Damage | Wolfenstein Enemy Territory Demo Format |
| DM_84 file extension | Splash Damage | Wolfenstein Enemy Territory Demo Format |
| DN1 file extension | Apogee Software | Duke Nukem Episode 1 Game Format |
| DN2 file extension | Apogee Software | Duke Nukem Episode 2 Game Format |
| DN3 file extension | Apogee Software | Duke Nukem Episode 3 Game Format |
| DNF file extension | 3D Realms | Duke Nukem Forever Map Format |
| DNH file extension | Danmakufu | Touhou Danmakufu Game Script Format |
| DNI file extension | Cyan Worlds, Inc. | RealMyst 3D Game Archive |
| DNP file extension | TQ Digital Entertainment | Eudemons On-line Game Data |
| DNS file extension | 3D Realms | Duke Nukem Forever Save Format |
| DO2 file extension | N/A | Resident Evil 2 Door |
| DOF file extension | N/A | Racer 3D Geometry |
| DOL file extension | Nintendo | Nintendo GameCube Executable Format |
| DOR file extension | Capcom Co., Ltd. | Resident Evil 1 Game |
| DPC file extension | Sony Corporation | Twisted Metal 2 Texture |
| DPF file extension | The Dargon Project | Dargon Package |
| DREAMCHRONICLESSAVEDGAME file extension | KatGames | Dream Chronicles Saved Game |
| DRS file extension | Microsoft Studios | Age Of Empires 2 Game |
| DS1 file extension | Blizzard Entertainment, Inc. | Diablo 2 Map |
| DS2RES file extension | Gas Powered Games | Dungeon Siege 2 Data |
| DSG file extension | Shawn Overcash | Decker Saved Game Format |
| DTI file extension | N/A | FIFA 2001 Data |
| DTL file extension | Electronic Arts, Inc. | The Sims |
| DUA file extension | Electronic Arts, Inc. | FIFA 2001 Data Feart Legalscr |
| DUC file extension | Datel | Action Replay Max DS Save Format |
| DUN file extension | Trendy Entertainment | Dungeon Defenders Saved Game Format |
| DV2 file extension | Larian Studios | Divine Divinity 2 Game Format |
| DXS file extension | N/A | Deus Ex Saved Game Format |
| DXT file extension | LucasArts Entertainment Company, LLC | LucasArts The Secret Of Monkey Island: Special Edition Texture |
| DZ file extension | BrainBox Games | Land Of The Dead Level Format |
| DZIP file extension | CD Projekt | The Witcher 2 Game Archive |
| E2GM file extension | Pangea Software | Pangea Enigmo Custom Game Format |
| E3MOD file extension | Strategy First | Emergency 3 Mod Package |
| E4MOD file extension | Sixteen Tons Entertainment | Emergency 4 Mod |
| EA3 file extension | Electronic Arts, Inc. | Fifa 2001 Environment Game Data |
| EBP file extension | Relic Entertainment Inc. | Relic Entertainment Game |
| ED file extension | Monolith Productions, Inc. | LithTech Game Level |
| EDAT file extension | Sony | Sony Playstation Portable PSP Encrypted Data Format |
| EDT file extension | Sega Corporation | Football Manager Mod |
| EEPF file extension | EmuOS Development Team | EmuOS Exchangeable Packet Format |
| EES file extension | Sierra Entertainment, Inc. | Empire Earth Scenario |
| EFF file extension | Sony Corporation | EverQuest Effects |
| EFT file extension | Gravity Interactive Inc. | ROSE Online Effects Data |
| EGM file extension | Pangea | Pangea Enigmo Custom Game Format |
| EIC file extension | Nitro Games Ltd. | East Indian Company Save Game |
| EIX file extension | Ymir Entertainment | Metin2 Game Data Package Format |
| EKV file extension | Valve Corporation | Left 4 Dead |
| ELF file extension | Sony | PlayStation Executable Format |
| ELM file extension | Eternal Lands | Eternal Lands Map Format |
| ELU file extension | id Software LLC | Quake 3 Arena Model Shell |
| ELV file extension | N/A | Aces High Map Data |
| EMI file extension | BlitWise Productions LLC | Pocket Tanks Emitter |
| EMT file extension | Sony Corporation | EverQuest |
| EMW file extension | Capcom Co., Ltd. | Resident Evil Model |
| END file extension | N/A | Nova Logic Game Cinematics |
| ENG file extension | N/A | Chess Engine |
| EPC file extension | BBC | Doctor Who Game Data Format |
| EPK file extension | Ymir Entertainment | Metin2 Game Data Package Format |
| ERB file extension | Sierra | Evil Genius Resource Format |
| ERF file extension | BioWare | BioWare Aurora Engine Encapsulated Resource Format |
| ERP file extension | Future Games | Alter Ego Game Format |
| ESCAPEROSECLIFFISLANDSAVEDGAME file extension | SpinTop Games | Escape Rose Cliff Island Saved Game |
| ESF file extension | The Creative Assembly | Total War Campaign Settings |
| ESG file extension | Pangea | Pangea Enigmo Saved Game Format |
| ESI file extension | tom7.org | Escape Level Index |
| ESM file extension | Bethesda Softworks | Elder Scrolls Master Format |
| ESP file extension | Bethesda Softworks | Gamebryo Game Engine Plug-in Format |
| EST_UAX file extension | Epic Games | Spanish Unreal Audio Package |
| EUR file extension | Capcom Co., Ltd. | Monster Hunter Freedom Unite EU Region Save Game |
| EVD file extension | Rockstar Games, Inc. | Grand Theft Auto IV Vehicle Extended Data |
| EXC file extension | Lionhead Studios | Black & White Zone Format |
| EXH file extension | Electronic Arts, Inc. | NHL Game Exhibition Roster |
| EXS file extension | Spiderweb Software | Blades Of Exile Scenario Format |
| FAM file extension | N/A | The Sims Family |
| FAR file extension | N/A | The Sims Archive Format |
| FATESAVEDGAME file extension | WildTangent, Inc. | Fate Save Game |
| FATEUNDISCOVEREDREALMSSAVEDGAME file extension | WildTangent, Inc. | Fate Undiscovered Realms Save Game |
| FBD file extension | NovaLogic, Inc. | F-22 Lightning Gravis Joystick Control |
| FBI file extension | Cavedog Entertainment | Total Annihilation Main Unit Definition |
| FBQ file extension | Frozenbyte, Inc. | Trine 2 Game Archive |
| FBRB file extension | Electronic Arts | Battlefield Bad Company 2 Game Format |
| FC2MAP file extension | Ubisoft | Far Cry 2 User Map Format |
| FCM file extension | fCraft | FCraft World Format |
| FF file extension | Activision | Call Of Duty FastFile Format |
| FFN file extension | Electronic Arts, Inc. | FIFA World Cup Game Data Fe Art |
| FGD file extension | Valve | Forge Game Data Format |
| FILA file extension | Bungie Studios | Aleph One Replay Format |
| FL file extension | Microsoft | Freelancer Saved Game Format |
| FLD file extension | YSFLIGHT.com | YSFLIGHT Field Format |
| FLMOD file extension | Microsoft Corporation | Freelancer Game Archive |
| FMF file extension | Sports Interactive | Football Manager 2012 Game Graphics Package |
| FML file extension | THQ | WWE RAW Character Format |
| FNTA file extension | Bungie Studios | Marathon 2 Aleph One Font Format |
| FOMOD file extension | N/A | Fallout 3 Mod Format |
| FORGE file extension | Ubisoft | Assassins Creed Game Audio Or Data Format |
| FOS file extension | Bethesda Softworks | Fallout 3 Saved Game Format |
| FP2 file extension | GameHouse, Inc. | Insaniquarium Deluxe Fish |
| FPG file extension | The Game Creators | FPS Creator Game Project Format |
| FPID file extension | The Game Creators | FPS Creator AI Wizard Data Format |
| FPM file extension | The Game Creators | FPS Creator Map Format |
| FPMB file extension | The Game Creators | FPS Creator Map Buffer Format |
| FPMO file extension | The Game Creators | FPS Creator Map Overlay Format |
| FPOP file extension | Activision | Spider-Man: Shattered Dimensions Saved Game |
| FPP file extension | The Game Creators | FPS Creator Prefab Format |
| FPS file extension | The Game Creators | FPS Creator Project Format |
| FRA file extension | Electronic Arts, Inc. | Fifa World Cup Game Data |
| FRC file extension | Matthias Neusinger | Microsoft Flight Simulator FS Recorder Recorded Format |
| FRD file extension | Electronic Arts, Inc. | Need For Speed Track Data |
| FRE file extension | Electronic Arts, Inc. | FIFA 2002 Data Legal Screen |
| FREECELLSAVE-MS file extension | Microsoft | FreeCells Saved Game Format |
| FRM16 file extension | Interplay Entertainment Corporation | Lionheart: Legacy Of The Crusader Game |
| FRW file extension | Atari, Inc. | RollerCoaster Tycoon Fireworks Source |
| FRZ file extension | The Snes9x Team | Snes9x Saved State Format |
| FS2 file extension | Interplay | Descent FreeSpace 2 Game Format |
| FS5 file extension | Microsoft Studios | Microsoft Flight Simulator Scenery |
| FS6 file extension | Microsoft Studios | Microsoft Flight Simulator Panels |
| FSG file extension | The FreeCol Team | FreeCol Saved Game Format |
| FSM file extension | Interplay | Descent FreeSpace Mission Format |
| FSSAVE file extension | Microsoft | Flight Simulator Save Format |
| FST file extension | Viva Media | Crazy Machines 2 Object Format |
| FUK file extension | Running With Scissors | Postal 2 Map |
| FWD file extension | Atari, Inc. | RollerCoaster Tycoon Fireworks Display |
| FXCB file extension | CRYTEK | Crysis Shader Cache |
| G3P file extension | Microprose | Grandprix 3 Car Physics |
| G3X file extension | Knife Edge Software | RealFlight Content Format |
| G4B file extension | N/A | Sokoban++ Level |
| G64 file extension | N/A | C64 Emulator Disk Image |
| GAF file extension | Cavedog Entertainment | Total Annihilation Animated Bitmap Format |
| GALAXY file extension | Blizzard Entertainment | Blizzard Starcraft 2 Galaxy Script Format |
| GAM file extension | N/A | Game Format |
| GAME file extension | Apple | Apple Mac OS X Chess Format |
| GAMEDATA file extension | Sandlot Games | Sandlot Game Data Format |
| GAR file extension | GIANTS Software | Farming Simulator Game Archive Format |
| GAX file extension | Microsoft Studios | Age Of Empires II Save Game |
| GB file extension | N/A | Nintendo Gameboy ROM Image |
| GBA file extension | N/A | Nintendo Game Boy Advance ROM Image |
| GBASKIN file extension | N/A | GBA4iOS Controller Skin |
| GBC file extension | N/A | Nintendo GameBoy Colour Emulator ROM Image Format |
| GBCSKIN file extension | N/A | GBA4iOS Controller Skin |
| GBL file extension | William D. Hause | Gravityball |
| GBLORB file extension | N/A | Interactive Fiction |
| GBX file extension | Nadeo | Nadeo Games Format |
| GC file extension | Pandemic Studios | Star Wars Battlefront 2 Saved Game Format |
| GCF file extension | Valve | Steam Client Grid Cache Format |
| GCI file extension | Nintendo | Nintendo GameCube Saved Game Format |
| GCM file extension | Nintendo | GameCube Image Format |
| GCS file extension | GameShark | GameShark SharkSave For GameCube Format |
| GCT file extension | Ocarina Cheat Code Manager | Ocarina Cheat Code Manager Exported Cheat Format |
| GCZ file extension | N/A | Compressed GameCube/Wii ROM |
| GDT file extension | Activision | Call Of Duty Info |
| GDW file extension | Majesco Entertainment | Jaws Unleashed Data Format |
| GEA file extension | Electronic Arts, Inc. | Fifa World Cup Game Data |
| GFX file extension | Blizzard Entertainment, Inc. | Warcraft II Image |
| GGPK file extension | Grinding Gears Games | Grinding Gears Package |
| GGS file extension | N/A | Gameboy Emulator |
| GIC file extension | BioWare | BioWare Aurora Engine Area |
| GIT file extension | BioWare | BioWare Aurora Game Engine Area |
| GJD file extension | Trilobyte | 7th Guest Game Archive |
| GLB file extension | N/A | Glulx Blorb Game Format |
| GM1 file extension | The 3DO Company | Heroes Of Might & Magic 3 Saved Game |
| GM2 file extension | The 3DO Company | Heroes Of Might & Magic III Saved Game |
| GM3 file extension | The 3DO Company | Heroes Of Might & Magic III Saved Game |
| GM4 file extension | The 3DO Company | Heroes Of Might & Magic III Saved Game |
| GME file extension | InterAct | Interact DexDrive Sony Playstation Memory Card Save |
| GMP file extension | Rockstar Games, Inc. | GTA2 Game |
| GMR file extension | YoYo Games | Game Maker Compiled Game |
| GMRES file extension | YoYo Games | Game Maker Resource Format |
| GMV file extension | Gens | Gens Movie Capture Format |
| GNM file extension | N/A | GNM Output Music |
| GOB file extension | LucasArts Entertainment Company, LLC | LucasArts Game Resource |
| GOD file extension | Bullfrog Productions | Populous 2 Saved Game Format |
| GOOMOD file extension | 2D Boy | World Of Goo Add-on |
| GOR file extension | Eidos Interactive Ltd. | Myth: The Fallen Lords Game Data |
| GPF file extension | Gravity Interactive | Ragnarok Online Gravity Re-packed Format |
| GPM file extension | Gravity Interactive Inc. | Ragnarok Online Update |
| GR2 file extension | RAD Game Tools | Granny 3D Format |
| GRF file extension | Gravity | Ragnarok Game Archive Format |
| GRLE file extension | GIANTS Software GmBH | Farming Simulator Save Game |
| GRM file extension | NovaLogic, Inc. | NovaLogic Game Facial Expressions |
| GRP file extension | Blizzard Entertainment | StarCraft Graphics Group Format |
| GS0 file extension | N/A | Sega Genesis (Megadrive) Emulator Quick Slot 0 Save Format |
| GS4 file extension | Bloodlust Software | Genecyst Saved State Slot 4 |
| GSC file extension | Activision | Call Of Duty Script Format |
| GSX file extension | N/A | Gens Sega Emulator Save State Format |
| GVM file extension | Sega Corporation | Phantasy Star Online |
| GVR file extension | Sega Corporation | Phantasy Star Online |
| GZP file extension | Interplay Entertainment Corporation | Giants Citizen Kabuto Game |
| GZR file extension | MAIET Entertainment, Inc. | GunZ |
| H2O file extension | Liquid Entertainment | Battle Realms Game Data Format |
| H3C file extension | The 3DO Company | Heroes Of Might And Magic 3 Campaign |
| H3M file extension | New World Computing | Heroes Of Might And Magic 3 Map Format |
| H4M file extension | Capcom Co., Ltd. | Resident Evil Zero Game |
| H4R file extension | New World Computing | Heroes Of Might And Magic 4 Data Format |
| HAK file extension | BioWare | BioWare Aurora Engine |
| HAM file extension | N/A | Descent 2 Resource Format |
| HARDDISK file extension | N/A | Boxer For Mac Harddisk |
| HAT file extension | Sony Corporation | Formula 1 Car Race 2001 Log Hat |
| HAZ file extension | Microsoft Studios | Microsoft Flight Texture |
| HBR file extension | Mario Carbajal | HaxBall Replay |
| HEA file extension | Electronic Arts, Inc. | Fifa 2001 Data |
| HEARTSSAVE-MS file extension | Microsoft | Hearts Saved Game Format |
| HFB file extension | David Peterson | Hell Fighter Battle |
| HG1 file extension | Electronic Arts, Inc. | Hellgate: London Saved Game |
| HGH file extension | LucasArts Entertainment Company, LLC | Star Wars: Tie Fighter High Score |
| HGP file extension | Slick Software | HighGrow Plant |
| HHSL file extension | Evert Etienne | Hockey High Score List Format |
| HI file extension | The MAME Team | High Scores Format |
| HIL file extension | Mediamond | Deluxe Ski Jump 3 Hill |
| HIM file extension | Gravity Interactive Inc. | ROSE Online Highmaps |
| HISAWSAVE file extension | Her Interactive, Inc. | Nancy Drew Saved Game |
| HIT file extension | N/A | The Sims Sound Format |
| HKE file extension | Mindware Studios, s.r.o. | Painkiller Overdose Game |
| HKX file extension | Bethesda Softworks LLC | Skyrim Animation |
| HL1 file extension | Valve Corporation | Half-Life Saved Game |
| HLK file extension | Relic Entertainment Inc. | Warhammer 40k Dawn Of War 2 Animation |
| HMP file extension | Team17 Software | Worms Height Map Format |
| HOB file extension | Microprose | Star Trek Birth Of The Federation Ship Graphic Data |
| HOD file extension | Relic Entertainment Inc. | Homeworld Object Data |
| HOG file extension | N/A | Descent Hog Format |
| HOGG file extension | Cryptic Studios, Inc. | Cryptic Studios Data |
| HONMOD file extension | HON Modification Manager | Heroes Of Newerth Mod Format |
| HOT file extension | Electronic Arts | The Sims Sound Format |
| HOTSPOT file extension | Relic Entertainment Inc. | Homeworld Cursor Informaiton |
| HPS file extension | Frictional Games | HPL2 Script |
| HQR file extension | Electronic Arts, Inc. | Little Big Adventure HQR |
| HSM file extension | Electronic Arts, Inc. | The Sims Sound |
| HSV file extension | Blizzard Entertainment, Inc. | Diablo: Hellfire Singleplayer Character Data |
| HUL file extension | Acclaim Games Inc. | Re-Volt Collision Data |
| HULL file extension | Valve Corporation | Half-Life Map Collision Hull |
| HUN file extension | N/A | Personal Paint Hungarian Language User Interface |
| HVA file extension | Electronic Arts, Inc. | Command And Conquer Tiberian Sun Voxel Animation Control |
| HWD file extension | Hedgewars Project | Hedgewars Game Replay Format |
| HWL file extension | Erwin Ravau Software | Hangman Deluxe Word List |
| HWMAP file extension | Hedgewars Project | Hedgewars Drawn Map Format |
| HWS file extension | Hedgewars Project | Hedgewars Saved Game Format |
| HXM file extension | N/A | Descent 2 Resource Modification Format |
| I3A file extension | Zepetto Co. | Point Blank Game |
| I3ANIMPACK file extension | Zepetto Co. | Point Blank Game |
| I3CHR file extension | Zepetto Co. | Point Blank Game |
| I3EXEC file extension | Zepetto Co. | Point Blank |
| I3PACK file extension | Zepetto | Point Blank Game Data Format |
| I3S file extension | Zepetto Co. | Point Blank Game |
| IAI file extension | N/A | Nova Logic Item Attributes Info |
| IAO file extension | ImperiumGames | ImperiumAO Data |
| IB2 file extension | IncrediBots | IncrediBots World Map Format |
| IB3 file extension | IncrediBots | IncrediBots World Map Format |
| IBF file extension | Square Enix, Inc. | Final Fantasy XI Game |
| IBI file extension | Raven Software | Raven Software ICARUS Compiled Script |
| IBRO file extension | IncrediBots | IncrediBots Robot Format |
| IBT file extension | Eidos | Thief Deadly Shadows Texture And Model Format |
| IC8 file extension | N/A | Neo Geo BIOS |
| IDM file extension | Atari, Inc. | Fahrenheit |
| IDS file extension | BioWare | Infinity Game Engine |
| IDX0 file extension | Jagex | RuneScape Cache Index Format |
| IDX255 file extension | Jagex | RuneScape Cache Index Format |
| IEX file extension | Leagacy Interactive | The Tuttles Madcap Misadventures |
| IFP file extension | Rockstar Games | Grand Theft Auto Animation Format |
| IFR file extension | Sony Corporation | Formula One 2001 Game |
| IGL file extension | Elmer Productions | IGOR Game |
| IIE file extension | N/A | SimIIe Emulator |
| IM file extension | Auran Games | Indexed Mesh |
| IMC file extension | LucasArts Entertainment Company, LLC | LucasArts Game Sound |
| IMGA file extension | Bungie Studios | Marathon 2 Aleph One Image Format |
| IMGB file extension | SQUARE ENIX CO. | Final Fantasy XII Model |
| IMS file extension | LucasArts Entertainment Company, LLC | Rebel Assault Game |
| INB file extension | LucasArts Entertainment Company, LLC | Rebel Assault Backup |
| INN file extension | Activision Blizzard, Inc. | Phantasmagoria Ini |
| INP file extension | The MAME Team | MAME Replay Format |
| INSANIQUARIUMDELUXESAVEDGAME file extension | GameHouse, Inc. | Insaniquarium Deluxe Save Game |
| INV file extension | Copyboy | Minecraft INVedit Format |
| IPL file extension | Rockstar Games | Grand Theft Auto III Object Placement Data Format |
| IPS file extension | N/A | International Patching System Binary Patch Format |
| ISB file extension | Sony Online Entertainment | Vanguard Music |
| ISL file extension | N/A | The Universal Game Server Export |
| ISR file extension | N/A | Go-Moku Game Format |
| ITK file extension | ScummVM | ScummVM Game Data Format |
| ITP file extension | BioWare | BioWare Aurora Game Engine Palette |
| ITR file extension | Muskedunder Interactive | Icy Tower Format |
| IVT file extension | AddGames Italia | International Volleyball 2006 Data Format |
| IWD file extension | Activision | Call Of Duty Game Archive Format |
| IX3 file extension | Lokasoft | Rebel Chess Program Database Format |
| IX4 file extension | Lokasoft | Rebel Chess |
| J2B file extension | Epic Games, Inc. | Jazz Jackrabbit 2 Music |
| J2D file extension | Epic Games, Inc. | Jazz Jackrabbit Data |
| J2E file extension | Epic Games, Inc. | Jazz Jackrabbit 2 Episode |
| J2I file extension | Epic Games | Jazz Jackrabbit 2 Internet Server Link Format |
| J2L file extension | Epic Games | Jazz Jackrabbit 2 Level Format |
| JA file extension | N3V Games | Jet Archive |
| JAG file extension | Jagex | Jagex Data Format |
| JAM file extension | Sony | PS3 Unreal Tournament 3 Mod Format |
| JAP file extension | N/A | Japanese Nintendo 64 Game ROM |
| JBL file extension | id Software LLC | Doom Scene Add-on |
| JEWELQUESTSAVEDGAME file extension | iWin, Inc. | Jewel Quest Saved Game |
| JG4 file extension | Lena Games | BigJig Jigsaw Puzzle Format |
| JIG file extension | GameHouse, Inc. | GameHouse Puzzle Jigsaw Game |
| JIGSAW file extension | Carolina Road Software | Jigsaw Explorer Puzzle Format |
| JIGZ file extension | Bitz & Pixelz BV | Jiggsaw Puzzle |
| JIT file extension | Gala-Net Inc. | Aika Online Texture |
| JKB file extension | id Software LLC | Quake 3 Arena Bot AI |
| JKL file extension | LucasArts Entertainment Company, LLC | Jedi Knight |
| JKS file extension | LucasArts Entertainment Company, LLC | Jedi Knight Save |
| JMA file extension | N/A | NSRT Compressed Game |
| JPZ file extension | N/A | Puzzle Solver Puzzle |
| JQ3SAVEGAME file extension | iWin, Inc. | Jewel Quest III Saved Game |
| JRC file extension | N/A | PCjr Cartridge ROM Format |
| JRF file extension | N/A | The Jumbot Bot Level Navigation |
| JRL file extension | BioWare | BioWare Aurora Game Engine Journal |
| JRZ file extension | Sony | Sony Playstation Portable Game Data Format |
| K2S file extension | Mantronic Software | Kaiser 2 Saved Game |
| KA file extension | Epic Games, Inc. | Karma Engine (Unreal) Asset |
| KCL file extension | Nintendo | Mario Kart Wii Collision Information Format |
| KDA file extension | NovaLogic, Inc. | Nova Logic Game |
| KF file extension | N/A | The Elder Scrolls Game |
| KFS file extension | Rockstar Games, Inc. | Max Payne Model |
| KLD file extension | Electronic Arts, Inc. | Dungeon Keeper 2 Playable Map |
| KNW file extension | Live for Speed - Scawen Roberts, Eric Bailey, Victor van Vlaardingen | Live For Speed AI Knowledge |
| KODU file extension | Microsoft | Kodu Game Format |
| KRN file extension | Electronic Arts, Inc. | NBA 99 Fonts |
| KSML file extension | Gearbox Software | Halo Custom Edition |
| KTO file extension | Kunos Simulazioni | NetKar Pro Mid Ohio |
| KV6 file extension | Ace of Spades | Ace Of Spades Model Format |
| KWREPLAY file extension | Electronic Arts | Command & Conquer 3 Replay Format |
| L2R file extension | NCsoft Corporation | Lineage II Replay |
| L3D file extension | Lionhead Studios | Black & White Graphics Format |
| LA0 file extension | LucasArts Entertainment Company, LLC | LucasArts Game Data |
| LA1 file extension | LucasArts Entertainment Company, LLC | LucasArts Game Data |
| LA2 file extension | LucasArts Entertainment Company, LLC | LucasArts Game Data |
| LABY file extension | Laby | Laby Level Format |
| LAT file extension | Magnum Opus | Crossword Express Lattice |
| LBF file extension | 2K Games | Bioshock 2 Configuration |
| LDB file extension | Rockstar Games | Max Payne Level Format |
| LDO file extension | NovaLogic, Inc. | Nova Logic Game Loadout Text |
| LDW file extension | LDW Software | Virtual Villagers Save Game Format |
| LEV file extension | Team17 Software Limited | Worms Map |
| LGL file extension | LeechGet | LeechGet Download Queue Format |
| LGP file extension | Square Enix | Final Fantasy Game Archive Format |
| LGR file extension | Balazs Rózsa | Elasto Mania Character Skin |
| LHZ file extension | N/A | LHA Compressed File Archive |
| LIP file extension | Bethesda Softworks | Bethesda Softworks Lip Sync Format |
| LL file extension | Combit | List & Label Preview Format |
| LMG file extension | CRYTEK | CryENGINE Locomotion Group Animation |
| LMP file extension | id Software LLC | Doom Recorded Demo |
| LMU file extension | Enterbrain | RPG Maker Map Format |
| LNC file extension | Sports Interactive | Football Manager Player |
| LNZ file extension | Ubisoft Entertainment S.A. | Petz Linez |
| LOD file extension | Ubisoft | Heroes Of Might And Magic 3 Graphics Format |
| LOS file extension | Atomic Games, Inc. | Close Combat 2 Map Related |
| LOVE file extension | LÖVE | LÖVE Game Package Format |
| LPB file extension | JEK Software | LaserTank Game Replay Format |
| LPR file extension | Relic Entertainment Inc. | Homeworld |
| LRM file extension | inXile entertainment | Line Rider 2 Unbound Saved Track |
| LRN file extension | Apple, Inc. | Apple Chess User Data |
| LRP file extension | inXile entertainment | Line Rider 2 Unbound Puzzle Part |
| LSD file extension | Enterbrain | RPG Maker Saved Game Format |
| LSW file extension | Enterbrain | RPG Maker Saved Game Format |
| LTA file extension | Monolith Productions, Inc. | Monolith Lithtech Game Engine |
| LTB file extension | Gravity Interactive Inc. | ROSE Online |
| LTG file extension | JEK Software | LaserTank Graphics Format |
| LTX file extension | GSC Game World | S.T.A.L.K.E.R. Game Format |
| LUG file extension | N/A | Game |
| LUV file extension | Sega Corporation | Medieval 2 Total War |
| LUXB file extension | Sillysoft | Lux Delux Map Format |
| LV6 file extension | Midnight Synergy | Return To Wonderland Level |
| LVB file extension | LucasArts Entertainment Company, LLC | Outlaws Game |
| LVL file extension | N/A | Game Level Format |
| LWF file extension | NovaLogic, Inc. | Nova Logic Game Hold Sound Profiles |
| LXT file extension | GSC Game World | S.T.A.L.K.E.R. |
| LZC file extension | Electronic Arts, Inc. | Need For Speed Undercover Game Data |
| LZP file extension | Legacy Interactive | Law And Order 3: Justice Is Served Game |
| M2 file extension | Blizzard Entertainment | World Of Warcraft Model Object File Format |
| M32 file extension | 3D Realms/Apogee Software Ltd. | Duke Nukem 3D Script |
| M3H file extension | Blizzard Entertainment, Inc. | Starcraft 2 Model Data |
| M3S file extension | Ubisoft Entertainment S.A. | Myst III Exile Saved Game |
| M3T file extension | Ubisoft Entertainment S.A. | Myst 3 Exile Text |
| M4S file extension | Ubisoft Entertainment S.A. | Myst IV: Revelation Save Game |
| M64 file extension | N/A | Mupen64 Movie Capture |
| M8 file extension | Raven Software | Heretic II MipMap Image |
| MA0 file extension | Blizzard Entertainment, Inc. | Diablo II Act 1 Saved Map Progress |
| MA2 file extension | Blizzard Entertainment, Inc. | Diablo II Act 3 Saved Map Progress |
| MA3 file extension | Blizzard Entertainment, Inc. | Diablo II Act 4 Saved Map Progress |
| MAE file extension | My Avatar Editor | My Avatar Editor Character Format |
| MAHJONGTITANSSAVE-MS file extension | Microsoft | Mahjong Titans Save Game Format |
| MANM file extension | Pterodon | Vietcong Game Data Format |
| MAO file extension | BioWare | Dragon Age Origins MAO XML |
| MAP file extension | id Software | Game Map Format |
| MAPLET file extension | Blitz Research | Maplet World Format |
| MASSEFFECTPROFILE file extension | Electronic Arts | Mass Effect User Profile |
| MASSEFFECTSAVE file extension | Electronic Arts | Mass Effect Saved Game |
| MATO file extension | Mojiferous Industries | Atomic Combat Saved Game Format |
| MATPROJ file extension | BioWare | Dragon Age Origins Material |
| MAX file extension | Datel | Action Replay Max Save Format |
| MAZ file extension | Hover | Microsoft Windows Hover! Maze Format |
| MB1 file extension | 3D Realms/Apogee Software Ltd. | Monster Bash Game Data |
| MBE file extension | Electronic Arts, Inc. | MVP Baseball 2005 Game |
| MBZ file extension | N/A | Pogoshell NES Emulator Plugin |
| MCA file extension | Mojang | Minecraft Anvil Format |
| MCC file extension | N/A | Amiga MUI External Class Library |
| MCGAME file extension | Minecraft Launcher | Minecraft Backup Format |
| MCLEVEL file extension | Mojang Specifications | Minecraft Map Format |
| MCMETA file extension | Mojang | Minecraft Animation Settings Format |
| MCR file extension | The ePSXe Team | EPSXe Memory Card Format |
| MCWORLD file extension | Minecraft Launcher | Minecraft World Backup Format |
| MD2 file extension | id Software | Quake 2 Model Format |
| MD3 file extension | id Software | Quake 3 Model Format |
| MD4 file extension | id Software LLC | Quake 3 MD4 Skeletal Model Format |
| MDL file extension | N/A | Steam Source SDK Model Content Format |
| MDM file extension | Elksoft | Mario Dash Map Format |
| MDR file extension | N/A | ZX Spectrum Microdrive Emulator |
| MDV file extension | N/A | QLAY |
| ME2MOD file extension | N/A | Mass Effect 2 Game Modification Format |
| MEM file extension | Connectix | Virtual Game Station Memory Format |
| MENU file extension | id Software | Apple Mac OS X SystemUIServer MenuExtra Plugin Format |
| MGL file extension | Microsoft | Age Of Empires II Age Of Kings Game Format |
| MGX file extension | Microsoft | Age Of Empires 2 Replay Format |
| MGZ file extension | Konami Corporation | Metal Gear Solid Game Archive |
| MHD file extension | Bethesda Softworks LLC | Fallout 3 |
| MHK file extension | Brøderbund Software, Inc. | Riven Movie Data |
| MII file extension | Nintendo | Nintendo Wii Virtual Avatar Format |
| MINE file extension | Mojang Specifications | Minecraft Map Format |
| MINESWEEPERSAVE-MS file extension | Microsoft | Microsoft MineSweeper Save Format |
| MIS file extension | N/A | Mission Format |
| MISSION file extension | The Vega Strike Team | Vega Strike Mission Format |
| MIX file extension | Westwood Studios | Command & Conquer Game Format |
| MKR file extension | Microsoft Corporation | Train Simulator Marker |
| MLX file extension | Blizzard Entertainment, Inc. | Starcraft Saved Game |
| MM6 file extension | N/A | Might And Magic 6 Saved Game Format |
| MM7 file extension | N/A | Might And Magic 7 Saved Game Format |
| MM8 file extension | N/A | Might And Magic 8 Saved Game Format |
| MMX file extension | Westwood Studios (EA) | Command And Conquer Game |
| MN2 file extension | Interplay Entertainment Corporation | Descent 2 Mission |
| MN3 file extension | Interplay Entertainment Corporation | Descent 3 Mission |
| MNI file extension | Activision | Star Trek Elite Force 2 Game |
| MOD file extension | BioWare | Neverwinter Nights Module Format |
| MOG file extension | Sports Mogul Inc. | Football Mogul |
| MOMMA file extension | KPULV | Offspring Fling Replay Format |
| MON file extension | Virgin Games, Inc. | Monopoly Deluxe Game |
| MOPP file extension | Havok.com Inc. | Havok Engine |
| MP2M file extension | Rockstar Games | Max Payne 2 Mod Format |
| MP2S file extension | Rockstar Games | Max Payne 2 Saved Game Format |
| MPK file extension | Project64 | Project64 Memory Pack Format |
| MPM file extension | Rockstar Games | Max Payne Modification Format |
| MPQ file extension | Blizzard Entertainment | Blizzard Entertainment Archive Format |
| MPQE file extension | Blizzard Entertainment, Inc. | Blizzard Encrypted Game Data |
| MPS file extension | Rockstar Games | Max Payne Saved Game Format |
| MPZ file extension | Wouter van Oortmerssen | Red Eclipse Map Format |
| MRM file extension | JoWooD Entertainment AG | Gothic 2 |
| MRS file extension | MAIET Entertainment | Gunz Game Data Format |
| MS1 file extension | VIrtualBus | VirtualBus Map Format |
| MSX file extension | Microsoft Studios | Age Of Empires II Saved Game |
| MTR file extension | Knife Edge Software | RealFight Radio Control |
| MUL file extension | Origin Systems | Ultima Online Game |
| MUS file extension | Electronic Arts | Sony PlayStation 2 Music Format |
| MW4 file extension | Activision | MechWarrior Game Structure File Archive |
| MYP file extension | Electronic Arts, Inc. | Warhammer Online: Age Of Reckoning |
| N-GAGE file extension | Nokia | Nokia N-Gage Application Format |
| N3PMESH file extension | K2 Network | Knight Online 3D Mesh Format |
| N64 file extension | N/A | Nintendo 64 Emulation ROM Image Format |
| NAM file extension | Bethesda Softworks | G.E.C.K. Mod Data Format |
| NARC file extension | Nintendo | Nintendo DS Archive Format |
| NAV file extension | Valve | Counter-Strike Source CBot Navigation Mesh Format |
| NAZ file extension | Deadline Games | Total Overdose Game Data Format |
| NBFC file extension | N/A | Nintendo DS Nitro Basic File Character |
| NBFP file extension | N/A | Nintedo DS Nitro Basic File Palette |
| NBFS file extension | N/A | Nintendo DS Nitro Basic File Screen |
| NBT file extension | Mojang | Minecraft Named Binary Tag Format |
| NCER file extension | N/A | Nintendo DS Nitro Cell Resource |
| NCF file extension | Valve | Steam Client Game Configuration Format |
| NCGR file extension | Nintendo | Nintendo DS Title Graphics Format |
| NCLR file extension | Nintendo | Nintendo DS Color Palette Format |
| NCP file extension | EA Sports | NHL Ice Hockey 2002 User NHLcards |
| NCS file extension | BioWare | Bioware Aurora / Obsidian Electron Compiled Script |
| NDM file extension | Activision | Enemy Territory Quake Wars Demo |
| NDS file extension | N/A | Nintendo DS Game ROM Image Format |
| NEOSAVE file extension | Neopets, Inc. | Neopets Puzzle Adventure Saved Game |
| NES file extension | N/A | Nintendo Entertainment System ROM Image |
| NEZ file extension | N/A | NES ROM Emulator Image |
| NFG file extension | Redwood High School | RHS Nibbles Finished Game |
| NFO file extension | Microsoft | Age Of Empires Player Format |
| NFS11SAVE file extension | Electronic Arts | Need For Speed: Hot Pursuit 2010 Configuration Format |
| NFS13SAVE file extension | Electronic Arts, Inc. | Need For Speed: Most Wanted Saved Game |
| NGAGE file extension | Nokia | Nokia N-Gage Game Format |
| NGC file extension | N/A | NeoGeo Pocket Color ROM |
| NGH file extension | JoWooD Entertainment AG | Neighbours From Hell 2 Saved Game |
| NGN file extension | Terminal Reality | Fly! Engine Specification |
| NGP file extension | N/A | Neo Geo Pocket ROM Image Format |
| NH file extension | Stichting Mathematisch Centrum | NetHack Defaults |
| NHL file extension | EA Sports | Nhl Ice Hockey Game 2002 User Teams |
| NKM file extension | Nintendo | Mario Kart DS Track Data Format |
| NLB file extension | Codemasters | Colin McRae Rally Network Leader Boards Game |
| NLELEM file extension | Mad Data | NoLimits Rollercoaster Simulation Track Element Format |
| NLPX file extension | Mad Data | Mad Data NoLimits Game Data Format |
| NLTRACK file extension | Mad Data | NoLimits Roller Coaster Track Format |
| NML file extension | NSMBe | NSMB Editor Exported Level Format |
| NOB file extension | N/A | Silver Game Data |
| NON file extension | LucasArts Entertainment Company, LLC | Star Wars: Tie Fighter Mouse Options |
| NPC file extension | Raven Software | Star Wars Jedi Knight: Jedi Academy Game |
| NPJ file extension | NovaLogic, Inc. | Nova Logic Game Mission |
| NSBCA file extension | N/A | Nintendo DS Model Animation Format |
| NSBMD file extension | N/A | Nintendo DS Game 3D Model Format |
| NSBTX file extension | N/A | Nintendo DS Model Texture Format |
| NSCR file extension | Nintendo | Nintendo DS Title Screen Format |
| NTFP file extension | N/A | Nintendo DS Nitro File Palette |
| NTL file extension | N/A | Diablo 2 Mod D2NT Script |
| NTRK file extension | Ubisoft Entertainment | Pacific Fighters Track Format |
| NV file extension | The MAME Team | MAME NVRAM Format |
| NWN file extension | BioWare | Bioware Aurora Engine Module |
| NWX file extension | LucasArts Entertainment Company, LLC | Outlaws Choreography |
| O8D file extension | N/A | OCTGN Deck |
| O8G file extension | N/A | OCTGN Game Definition |
| O8S file extension | N/A | OCTGN Set |
| OAF file extension | Microsoft Studios | Microsoft Flight Simulator Texture |
| OAV file extension | Microsoft Studios | Microsoft Flight Simulator Texture |
| OBK file extension | Ubisoft Entertainment S.A. | UbiSoft ChessMaster Opening Book |
| ODF file extension | Activision | BattleZone Cartographers Guild Format |
| OGZ file extension | Wouter van Oortmerssen | Cube 2 Sauerbraten Map Format |
| OLV file extension | Chris Sawyer | Roller Coaster Tycoon |
| OMOD file extension | N/A | Oblivion Mod Manager Mod Format |
| OP2 file extension | Dynamix, Inc. | Outpost 2 Saved Game |
| OPA file extension | Terminal Reality | Fly! RAW Image Opacity Map |
| OPK file extension | N/A | Sinking Island/LIle Noyée Game |
| OPN file extension | Rebel Software | Rebel Strip Poker Opponent |
| OPPC file extension | Relic Entertainment Inc. | Space Marine Game Resource Package |
| OPQ file extension | Basilisk Games | Eschalon: Book I Game |
| ORK file extension | Games Workshop Group PLC | Warhammer Mark Of Chaos Game Archive |
| ORZ file extension | Netgame | Holic Game |
| OSF file extension | Interplay Entertainment Corporation | Descent 3 Sound |
| OSK file extension | peppy | Osu! Skin Format |
| OSR file extension | peppy | Osu! Game Replay Format |
| OSU file extension | peppy | Osu! Dialog Format |
| OSZ file extension | peppy | Osu! Beatmap Format |
| OTD file extension | N/A | OpenIV Texture Data |
| OVH file extension | Marcel Kuhnt und Rüdiger Hülsmann | OMSI Bus Settings |
| OVL file extension | Atari | RollerCoaster Tycoon 3 Sprite Format |
| OZT file extension | Webzen | Mu Online Texture |
| P00 file extension | N/A | C64 Emulator |
| P2M file extension | Mad Catz | Gameshark PlayStation 2 Cheats Format |
| P2S file extension | PCSX2 | PCSX2 Saved State |
| P3T file extension | Sony | Sony Playstation 3 Theme Format |
| P4F file extension | Webzen | MU Online [P4F] Launcher System Data |
| PACKAGE file extension | Electronic Arts | Electronic Arts Game Data Archive Format |
| PAK file extension | N/A | Game Resource Package Format |
| PAT0 file extension | N/A | Nintendo Wii Texture Pattern |
| PBN file extension | N/A | Portable Bridge Notation Format |
| PBO file extension | Bohemia Interactive | Packed Bohemia Object |
| PBP file extension | Sony | Sony PlayStation Portable Firmware Image |
| PCC file extension | Electronic Arts | Mass Effect Package Format |
| PCE file extension | N/A | TurboGrafx-16 ROM |
| PCK file extension | Perfect World | Perfect World Data Format |
| PCSAV file extension | Electronic Arts | Mass Effect Saved Game Format |
| PCSXSTATE file extension | PCSX | PCSX Emulator Saved Game Format |
| PDXA file extension | Paradox Interactive | Europa Universalis III |
| PEG file extension | PopCap Games | Peggle Game Replay Format |
| PEGN file extension | PopCap Games | Peggle Nights Replay Format |
| PER file extension | Microsoft | Age Of Empires Personality Format |
| PGB file extension | Ubisoft Entertainment S.A. | Rayman 2 |
| PGE file extension | N/A | PocketGrandmaster Game Engine |
| PGF file extension | Pokémon Mystery Gift Editor | Pokémon Mystery Gift For Black & White Format |
| PGN file extension | N/A | Portable Game Notation Format |
| PGT file extension | Pokemon Mystery Gift Editor | Pokémon Gift Format |
| PHE file extension | WinChess Team | WinChess Game Record |
| PHN file extension | Algoryx Simulation | Algodoo Phun Phunlet |
| PHYA file extension | Bungie Studios | Marathon 2 Aleph One Physics Format |
| PHZ file extension | Algoryx Simulation | Phun Compressed Phunlet Format |
| PIG file extension | Flying Lab Software | Game Archive |
| PJ file extension | Project64 | Project64 Game Progress Format |
| PJ1 file extension | Project64 Team | Project64 Save |
| PK1 file extension | Atari, Inc. | XS Game |
| PK3 file extension | Id Software | Id Tech 3 Engine Resource Format |
| PK4 file extension | id Software | Doom 3 Engine Game Data Format |
| PK5 file extension | Activision | Enemy Territory Quake Wars 23rd Century Warfare |
| PK7 file extension | N/A | ZDoom 7-zip Game Archive |
| PKG file extension | Sony | Sony PlayStation 3 Installation Package |
| PKM file extension | Pokesav | Pokemon Saved Game Data Format |
| PKMDL file extension | Mindware Studios, s.r.o. | Painkiller Overdose Game |
| PKR file extension | N/A | Tony Hawks Pro Skater 2 Game Archive |
| PKZ file extension | Piboso | Kart Racing Pro Track |
| PL1 file extension | The Adventure Maker Team | Adventure Maker Plug-in Format |
| PLAYER file extension | 4A Games | Metro 2033 Save Game |
| PLAYMISSION file extension | Immersive Education | MissionPlayer Game Format |
| PLN file extension | Microsoft | RealFlight Radio Control Airplane Description Format |
| PLR file extension | Image Space | Game Player Format |
| PLRE file extension | iWin, Inc. | Coconut Queen Game |
| PLT0 file extension | N/A | Nintendo Wii Color Palette |
| PNACH file extension | PCSX2 | PCSX2 Cheat Format |
| POA file extension | Electronic Arts, Inc. | FiFa World Cup Game Data Fe Art Legalscr |
| POD file extension | Terminal Reality | Terminal Velocity Archive |
| POF file extension | N/A | Descent Robot Definition Format |
| POG file extension | N/A | Descent 2 Texture Modification Format |
| POK file extension | N/A | ZX Spectrum Emulator Poke |
| POLARBOWLERSAVEDGAME file extension | WildTangent, Inc. | Polar Bowler Saved Game |
| POLARGOLFERSAVEDGAME file extension | WildTangent, Inc. | Polar Golfer Saved Game |
| POO file extension | N/A | Commodore C64 Machine Code |
| POP file extension | Valve | Team Fortress 2 Population Format |
| PPF file extension | N/A | PlayStation Patch Format |
| PQ file extension | N/A | Progress Quest Saved Character |
| PQHERO file extension | Infinite Interactive | Puzzle Quest Saved Game Format |
| PREFS file extension | VectorStorm | Preferences Or Project Settings Format |
| PRISON file extension | Introversion Software | Prison Architect Saved Game Format |
| PRK file extension | LucasArts | LucasArts Thrillville Park Format |
| PROFILE file extension | Pandemic Studios | Pandemic Studios Game Player Profile |
| PROP file extension | Electronic Arts, Inc. | Spore Property |
| PRX file extension | Sony | Playstation Protable Plug-in Format |
| PS2 file extension | PCSX2 | PCSX2 Memory Card Format |
| PSARC file extension | N/A | Sony Playstation 3 Game Archive |
| PSDL file extension | Microsoft | Midtown Madness 2 City Format |
| PSS file extension | Sony | Playstation 2 Video Game Format |
| PSSG file extension | Codemasters | EGO Engine Textures Format |
| PSU file extension | N/A | PS2 YABASIC Format |
| PSV file extension | Sony | Sony PlayStation 2 Save Format |
| PSX file extension | Sony | Sony PlayStation Game Save Format |
| PSYS file extension | ZEQ2 Project Team | ZEQ2 Format |
| PTA file extension | Vivendi Universal | NASCAR Racing 2003 Season Game |
| PTU file extension | NovaLogic, Inc. | Nova Logic Effects Definition |
| PUD file extension | Blizzard Entertainment, Inc. | WarCraft Map |
| PURBLEPAIRSSAVE-MS file extension | Microsoft | Purple Place Pair Save Game Format |
| PURBLESHOPSAVE-MS file extension | Microsoft | Purple Place Shop Save Game Format |
| PVI file extension | N/A | PODBot Knowledge |
| PVPF file extension | Zaplots | Pet Ville Save Format |
| PWF file extension | Valve | Counter-Strike PODBot Waypoint Format |
| PXP file extension | Valve | Half-Life: Counter-Strike POD-Bot Format |
| PZL file extension | Tibo Software | Jigs@w Puzzle Format |
| PZP file extension | Tibo Software | Jigs@w Saved Puzzle |
| Q2PLUG file extension | id Software LLC | Quake 2 For Mac Game |
| Q2RENDERER file extension | id Software LLC | Quake 2 For Mac Renderer Extension |
| QC file extension | id Software | Quake C Script Format |
| QDP file extension | MPQDraft | MPQDraft Plugin Format |
| QE4 file extension | Interplay Entertainment Corporation | Kingpin Life Of Crime Settings |
| QFS file extension | Electronic Arts, Inc. | Need For Speed Tracks Trk000 |
| QST file extension | Armaggedon Games | Zelda Classic Quest |
| QSU file extension | Armaggedon Games | Zelda Classic Quest |
| QSV file extension | Tibo Software | Jigs@w Saved Puzzle State |
| QUESTTEMPLATE file extension | Chucklefish LTD | Starbound Quest Template |
| QVM file extension | id Software | Quake Format |
| QWD file extension | N/A | QuakeWorld Demo Format |
| R8 file extension | Microsoft Studios | Microsoft Flight Simulator Texture |
| RA3AUTOSAVE file extension | Electronic Arts, Inc. | Command & Conquer Red Alert 3 Save Game |
| RA3CAMPAIGN file extension | Electronic Arts, Inc. | Command & Conquer Red Alert 3 Save Game |
| RA3REPLAY file extension | Electronic Arts, Inc. | Command & Conquer: Red Alert 3 Replay |
| RA3SKIRMISH file extension | Electronic Arts, Inc. | Command & Conquer: Red Alert 3 Skirmish Map |
| RADQ file extension | RadicalPlay.com | Need For Madness Game Archive |
| RAS file extension | N/A | Remedy Archive System Format |
| RAST file extension | Electronic Arts, Inc. | Spore Texture, Model |
| RBJ file extension | Marco Pontello | Extra Redcode Kit Compiled Redcode Object Format |
| RBXL file extension | ROBLOX | ROBLOX Game Format |
| RBXM file extension | ROBLOX | ROBLOX Model Format |
| RD2 file extension | Codemasters | TOCA Race Driver 2 Saved Game |
| RDA file extension | Ubisoft Entertainment | ANNO Game Data Format |
| RDE file extension | Mindware Studios, s.r.o. | Painkiller Overdose Game |
| RDM file extension | Matteo Guarnieri | Ragdoll Masters Preference |
| RE4 file extension | Capcom Co., Ltd. | Resident Evil 4 |
| REP file extension | Rockstar Games | Game Replay Format |
| RESDEX file extension | Firefly Studios Ltd. | Stronghold 3 Resource |
| REZ file extension | Monolith | LithTech Game Engine Resource Format |
| RFA file extension | Electronic Arts | Battlefield 1942 Game Archive |
| RFD file extension | Westwood Studios | Emperor: Battle For Dune Game Format |
| RFGS_PC file extension | Volition | Red Faction: Guerilla Saved Game Format |
| RFM file extension | Image Space | RFactor Modification Format |
| RFMOD file extension | N/A | RFactor 2 Mod |
| RGI file extension | RealNetworks, Inc. | RealArcade Game Installer |
| RGM file extension | Relic Entertainment Inc. | Essence Game Engine Model |
| RGP file extension | N/A | RealArcade Game Package |
| RGSS2A file extension | Enterbrain | RPG Maker VX RGSS Encrypted Archive Format |
| RGSS3A file extension | Enterbrain, Inc. | RPG Maker VX RGSS Version 3 Encrypted Archive |
| RGSSAD file extension | Enterbrain, Inc. | RPG Maker VX RGSS Encrypted Archive |
| RGZ file extension | Gravity Interactive Inc. | Ragnarok EXE And BGM Patch Archive |
| RI file extension | Techland | Xpand Rally Extreme Race Information Data |
| RIM file extension | BioWare | BioWare Resource Image Format |
| RKC file extension | Nintendo Co., Ltd. | Mario Kart Wii Competition Data |
| RKG file extension | Nintendo Co., Ltd. | Mario Kart Wii Ghost Data |
| RKP file extension | Rockchip | Rockchip MP4 Player Game |
| RKV file extension | Krome Studios | Star Wars The Clone Wars Republic Heroes Game Archive |
| RL file extension | Trilobyte | The 7th Guest Audio Data Format |
| RL1 file extension | Interplay Entertainment Corporation | Descent 1 Registered Level |
| RL2 file extension | Interplay Entertainment Corporation | Descent 2 Registered Level |
| RLEGZ file extension | Golly | Golly Compressed Pattern Format |
| RLST file extension | Electronic Arts, Inc. | Sims 3 Data |
| RLW file extension | Reflexive® Entertainment Inc. | Ricochet Lost Worlds: Recharged |
| RME file extension | SQUARE ENIX CO. | Final Fantasy Audio |
| RNR file extension | Trilobyte, Inc. | The 11th Hour Game Data |
| ROACJ file extension | Ubisoft Entertainment S.A. | Call Of Juarez Game Resource Data |
| ROFL file extension | Riot Games Inc. | Leagues Of Legends Replay |
| ROM file extension | N/A | Read Only Memory Image (emulators/AONs) |
| ROS file extension | Jonathan Taylor | BattleScribe Data Format |
| ROT file extension | Sierra Entertainment | Homeworld 2 Game Graphics Data Format |
| RP2 file extension | Cloanto | RetroPlatform Player (Amiga Forever) Format |
| RP3 file extension | Electronic Arts, Inc. | Need For Speed Game |
| RPACK file extension | Ubisoft Entertainment S.A. | Call Of Juarez Game Data |
| RPF file extension | Rockstar Games | Grand Theft Auto IV RAGE Engine Package Format |
| RPL file extension | Nabi Studios | Toribash Replay Game Format |
| RPV file extension | Rebel Software | Rebel Strip Poker Main Opponent Video |
| RPY file extension | Team Shanghai Alice | Touhou Project Replay Format |
| RPYC file extension | Ren'Py | RenPy Game Engine Compiled Script Format |
| RS2 file extension | RailSim2 | RailSim2 Layout Format |
| RSG file extension | Surreal Software, Inc. | Drakan Order Of The Flame |
| RSH file extension | Relic Entertainment Inc. | Warhammer 40,000 Texture |
| RUN file extension | Human Head Studios | Rune Map Format |
| RVDATA file extension | Enterbrain | RPG Maker Data Format |
| RVDATA2 file extension | Enterbrain, Inc. | RPG Maker VX Data |
| RVI file extension | Eidos Interactive Ltd. | Revenant Game Archive |
| RVM file extension | Eidos Interactive Ltd. | Revenant Game Archive |
| RVMAT file extension | Bohemia Interactive | Armed Assault Texture |
| RVPROJ file extension | Enterbrain | RPG Maker VX Project Format |
| RVPROJ2 file extension | Enterbrain, Inc. | RPG Maker VX Project |
| RVR file extension | Eidos Interactive Ltd. | Revenant Game Archive |
| RVS file extension | Eidos Interactive Ltd. | Revenant Game Archive |
| RW file extension | mackoy | BVE Trainsim Railway Definition |
| RWD file extension | Microsoft | Microsoft Flight Simulator Rewards Format |
| RWS file extension | Criterion Software | RenderWare Stream Format |
| RXDATA file extension | N/A | RPG Maker RMXP Data Format |
| S10 file extension | Brasfoot.com | Brasfoot Saved Game Format |
| S2 file extension | Unreal Software | Stranded II Map |
| S28 file extension | N/A | Genesis Or Sega32X ROM Image |
| S2M file extension | HeavenGames | Stronghold 2 Map Format |
| S2MA file extension | Blizzard Entertainment, Inc. | Starcraft 2 Map |
| S2MH file extension | Blizzard Entertainment | StarCraft 2 Map Header Format |
| S2Z file extension | S2 Games | S2Games Savage Game Format |
| S3T file extension | Gavin Camp | Scorched 3D Tankpack |
| S4M file extension | Irrational Games | SWAT 4 Map Format |
| S5X file extension | Ubisoft | Heritage Of Kings: The Settlers Map Format |
| SA1 file extension | N/A | Nintendo Game Boy Emulator Save Format |
| SABL file extension | Activision | Call Ot Duty: Black Ops II Audio Library |
| SABS file extension | Activision | Call Ot Duty: Black Ops II Sounds |
| SACRED2SAVE file extension | Ascaron Entertainment | Sacred 2 Save Game |
| SAD file extension | Lionhead Studios | Lucas Arts Sound Format |
| SAK file extension | Running With Scissors | Postal Game Archive |
| SAMI file extension | cpmusick | Grand Theft Auto San Andres Mod Installer Format |
| SAN file extension | Eidos Interactive Ltd. | Legacy Of Kain Series Game |
| SAV file extension | Nintendo | Saved Game Format |
| SAV2 file extension | GolemLabs Inc. | SuperPower Save Game |
| SAVE_MULTIPLAYER file extension | The Creative Assembly | Total War Multiplayer Save |
| SAW file extension | Carolina Road Software L.L.C. | Living Scenes Jigsaw Puzzles |
| SC1 file extension | Maxis | SimCity |
| SC2000 file extension | Electronic Arts, Inc. | Sim City 2000 Tileset |
| SC2ARCHIVE file extension | Blizzard Entertainment | StarCraft 2 Archive Format |
| SC2ASSETS file extension | Blizzard Entertainment | StarCraft 2 Game Assets Format |
| SC2BANK file extension | Blizzard Entertainment | StarCraft 2 Bank Format |
| SC2DATA file extension | Blizzard Entertainment | Starcraft 2 A.I. Game Format |
| SC2MA file extension | Blizzard Entertainment | StarCraft 2 Map Data Format |
| SC2MAP file extension | Blizzard Entertainment | StarCraft 2 Map Format |
| SC2MOD file extension | Blizzard Entertainment | StarCraft 2 Game Mod Format |
| SC2REPLAY file extension | Blizzard Entertainment | Starcraft 2 Game Replay Format |
| SC2SAVE file extension | Blizzard Entertainment | StarCraft 2 Game Saved Format |
| SC2SCENE file extension | Blizzard Entertainment | StarCraft 2 Cut Scene Format |
| SC3 file extension | Maxis | SimCity3000 Format |
| SC4 file extension | Electronic Arts | Game File Format |
| SC4DESC file extension | Electronic Arts | SimCity 4 Description Format |
| SC4LOT file extension | Electronic Arts | SimCity 4 Lot Format |
| SC5 file extension | Chris Sawyer | Chris Sawyer Locomotion Scenario |
| SC6 file extension | Chris Sawyer Productions | RollerCoaster Tycoon 2 Scenario Format |
| SCEA file extension | Bungie Studios | Marathon 2 Aleph One Map Format |
| SCENE file extension | Hidden Temple Studios | Antibody Level Format |
| SCF file extension | Maxis Software | SimTown Sound Format |
| SCHEMATIC file extension | MCEdit | MCEdit Schematic Format |
| SCL file extension | N/A | ZX Spectrum Emulator Disk Image |
| SCM file extension | Blizzard Entertainment | StarCraft Campaign Map Format |
| SCN file extension | Microsoft | Game Scenario Format |
| SCRABBLEHASBROSAVEDGAME file extension | Hasbro | Hasbro Scrabble Save Game |
| SCS file extension | Electronic Arts | SimCity Societies Saved Game Format |
| SCSPACK file extension | Electronic Arts, Inc. | SimCity Societies Transfer Package |
| SCX file extension | N/A | Game Scenario Format |
| SD7 file extension | Spring | Spring RTS Engine Data Format |
| SDT file extension | Rockstar Games | Grand Theft Auto III Audio Structure Data Format |
| SDZ file extension | Spring | Spring Content Package |
| SE1 file extension | Microsoft Studios | Microsoft Flight Simulator Scenery |
| SF7 file extension | N/A | Sega SF-7000 ROM |
| SFAR file extension | Electronic Arts | Mass Effect 3 DLC Add-on Format |
| SFB file extension | Sony | Sony Playstation 3 Game Disc Description Format |
| SFC file extension | N/A | Nintendo SNES9x ROM Format |
| SFD file extension | N/A | Sofdec Sega Dreamcast Movie Format |
| SFO file extension | N/A | Sony PlayStation Setting Format |
| SG file extension | Strategy First | Disciples II Save Game |
| SGA file extension | Relic Entertainment | Relic Entertainment SGA Archive Format |
| SGAA file extension | Bungie Studios | Aleph One Marathon 2 Save Game Format |
| SGB file extension | Relic Entertainment | Warhammer 40K Dawn Of War Map Format |
| SGD file extension | Olof Tjerngren | SameGame Data |
| SGH file extension | Activision | Guitar Hero 3 Setlist Settings |
| SGM file extension | VisualBoyAdvance | Visual Boy Advance Saved State Format |
| SGR file extension | Electronic Arts | SimCity 4 Graphics Rules |
| SH2 file extension | HeavenGames | Stronghold 2 Saved Game Format |
| SHADER file extension | id Software | Quake 3 Arena Id Tech 3 Game Engine Shader Format |
| SHADERCACHE file extension | Relic Entertainment Inc. | Space Marine Shader Cache |
| SHADERLIB file extension | Firefly Studios Ltd. | Stronghold 3 Shader |
| SHDC file extension | Bohemia Interactive | ArmA: Armed Assault |
| SHIPSECTION file extension | Kerberos Productions | Sword Of The Stars Ship Data |
| SHMAP file extension | Firefly Studios Ltd. | Stronghold 3 Map |
| SHPA file extension | Bungie Studios | Marathon 2 Aleph One Shape Format |
| SID file extension | Valve | Steam Game Data Backup Format |
| SIM3 file extension | Electronic Arts, Inc. | The Sims 3 |
| SIMS2PACK file extension | Electronic Arts | The Sims 2 Package Format |
| SIMS2SKIN file extension | Electronic Arts, Inc. | Sims 2 Skin |
| SIMS3 file extension | Electronic Arts, Inc. | The Sims 3 Save |
| SIMS3PACK file extension | Electronic Arts | The Sims 3 Game Package Format |
| SIN file extension | Microsoft Studios | Rise Of Nations Campaign Media |
| SJS file extension | Electronic Arts, Inc. | Simcity 3000 Buildings Add-on |
| SKD file extension | Rockstar Games, Inc. | Max Payne Model |
| SKSE file extension | N/A | The Elder Scrolls V: Skyrim Script Extender Data |
| SKUDEF file extension | Electronic Arts, Inc. | Command & Conquer Archive Description Package |
| SLM file extension | Linden Research | Second Life Mesh Asset |
| SLST file extension | N/A | Game Data Format |
| SM file extension | StepMania | ScriptMaker Script Format |
| SMC file extension | N/A | Super Nintendo Game-console ROM Image |
| SMD file extension | N/A | Sega Genesis ROM Emulator Format |
| SMO file extension | Gravitysensation.com | Sumotori Dreams Level Format |
| SMPD file extension | András Belicza | Sc2gears Mouse Print Data Format |
| SMS file extension | N/A | Sega Master System Emulator ROM Image Format |
| SMZIP file extension | StepMania | StepMania Package Format |
| SNAP file extension | N/A | ZX Spectrum Emulator Mirage Microdrive Snapshot |
| SNDA file extension | Bungie Studios | Marathon 2 Aleph One Sound Format |
| SNGW file extension | Capcom Co., Ltd. | Devil May Cry 4 Audio |
| SNI file extension | Interplay Entertainment Corporation | MDK Game Archive |
| SOD file extension | id Software LLC | Wolfenstein 3D Spear Of Destiny Game Data |
| SOE file extension | LucasArts Entertainment Company, LLC | Star Wars Shadows Of The Empire |
| SOLIDCONFIG file extension | BioWare | STAR WARS: The Old Republic Launcher Config |
| SOLITAIRESAVE-MS file extension | Microsoft | Windows Solitaire Saved Game Format |
| SOR file extension | ONNET USA | Shot Online Resource |
| SOUNDS file extension | id Software | Quake 3 Id Tech 3 Sound Definition Format |
| SOW file extension | Interplay | Renamed ARJ Archive Format |
| SP2 file extension | Super Ball 2 | Super Ball 2 Level Format |
| SP4 file extension | Chris Sawyer | Roller Coaster Tycoon Saved Game |
| SPAWN file extension | GSC Game World | S.T.A.L.K.E.R. Game |
| SPB file extension | Microsoft | Flight Simulator Mission Format |
| SPC file extension | N/A | Nintendo SNES Audio Format |
| SPIDERSOLITAIRESAVE-MS file extension | Microsoft | Microsoft Spider Solitaire Save Format |
| SPRITE file extension | SuperTux | SuperTux Sprite Format |
| SPS file extension | id Software | Quake 3 Id Tech 3 Game Engine Speaker Definition Format |
| SQF file extension | Bohemia Interactive | ArmA Script Format |
| SQH file extension | DreamCatcher Interactive | Harbinger Game |
| SQM file extension | Bohemia Interactive Studio | Operation Flashpoint Mission Format |
| SQS file extension | Bohemia Interactive | Operation Flashpoint Game Script |
| SRK file extension | Cryptic Sea | Sub Rosa Client Format |
| SRM file extension | N/A | Super Nintendo ROM Saved Game Emulator Format |
| SRT0 file extension | N/A | Nintendo Wii Animation Format |
| SS0 file extension | N/A | GameBoid First Saving Slot |
| SSFSAV file extension | McLeodGaming | Super Smash Flash Saved Game Format |
| ST3 file extension | Electronic Arts, Inc. | SimCity 3000 Starter Town City |
| STA file extension | The MAME Team | Generally Game Saved State |
| STEAMSTART file extension | Valve | Valve Steam Start Format |
| STN file extension | Microsoft Studios | Microsoft Flight Simulator Format |
| STREAMED file extension | id Software LLC | Rage Id Tech 5 Game Language |
| STS file extension | DuoS DSEMU | DuoS DSEMU Saved State Format |
| STSG file extension | SuperTux | SuperTux Saved Game |
| STUFF file extension | CCP | Eve Online Game Archive |
| STWM file extension | SuperTux | SuperTux Map Format |
| SUB file extension | Crystal Shard | SubTerra Level Format |
| SUD file extension | N/A | WISCO Word Power Sudoku Number Puzzle Format |
| SV1 file extension | Atari, Inc. | RollerCoaster Tycoon Saved Game |
| SV2 file extension | Atari, Inc. | RollerCoaster Tycoon Saved Game |
| SV4 file extension | Atari, Inc. | RollerCoaster Tycoon Saved Game |
| SV5 file extension | Lena Games | BigJig Saved Puzzle Format |
| SV6 file extension | Atari | RollerCoaster Tycoon 2 Saved Game Format |
| SV8 file extension | Atari, Inc. | RollerCoaster Tycoon |
| SVE file extension | Simutrans | Simutrans Format |
| SVH file extension | Terminal Reality | Fly! Simulated Vehicle Specification |
| SVS file extension | N/A | GpSP Game Boy Advance Emulator Saved State Format |
| SVT file extension | Runic Games | Torchlight Saved Game Format |
| SWC file extension | N/A | Super Nintendo Super Wildcard ROM Image |
| SWE file extension | Electronic Arts, Inc. | NHL Ice Hockey 2002 Required |
| SWV file extension | Microsoft | Microsoft Sidewinder Game Voice Settings Format |
| SWW file extension | Ubisoft Entertainment | ANNO Saved Game Format |
| SYB file extension | Microïds | Syberia II Game Archive Format |
| SYSTEM file extension | The Vega Strike Team | Vega Strike Virtual System Format |
| SZS file extension | N/A | GameCube Data Format |
| T3 file extension | Michael J. Roberts | TADS 3 Game |
| TAD file extension | Cavedog Entertainment | Total Annihilation Demo Saved Game Data |
| TAF file extension | Campbell Wild | ADRIFT Text Adventure Format |
| TAP file extension | N/A | Tap Tap Revenge Tap Format |
| TAS file extension | Campbell Wild | ADRIFT Text Adventure Save |
| TBC file extension | Sony Corporation | Formula 1 Car Race 2001 Season01 Vehicles |
| TBG file extension | BioWare | Infinity Engine Game |
| TBI file extension | Electronic Arts, Inc. | FIFA 2001 Data Cmn Be |
| TBM file extension | Nabi Studios | Toribash Mod Format |
| TCF file extension | Electronic Arts, Inc. | Theme Park World Game |
| TD4 file extension | Chris Sawyer Productions | RollerCoaster Tycoon Track Design Format |
| TD6 file extension | Chris Sawyer Productions | RollerCoaster Tycoon Track Design Format |
| TED file extension | Petroglyph Games | Star Wars Empire At War Alamo Game Engine Map Format |
| TEM file extension | N/A | RPG Toolkit Character |
| TER file extension | LionHead Studios | Black & White II Terrain Data |
| TEW file extension | Grey Dog Software | Wrestling Spirit |
| TEX0 file extension | N/A | Nintendo Wii Texture Format |
| TEXTUREPACK file extension | exDream GmbH | Arena Wars Texture Pack |
| TF2 file extension | Valve Corporation | Team Fortress 2 Data |
| TFR file extension | LucasArts | Star Wars Tie Fighter Game Pilot Format |
| TGH file extension | Activision | Guitar Hero 3 Tier Settings |
| TGI file extension | Maxis | SimCity 4 |
| TGQ file extension | Electronic Arts, Inc. | Dungeon Keeper 2 Movie Game |
| TGX file extension | Firefly Studios Ltd. | Stronghold |
| THEWITCHERSAVE file extension | CD Project | The Witcher Save Game |
| TI file extension | N/A | Homeworld Tactical Icon |
| TIGER file extension | Crystal Dynamics | Crystal Dynamics Game Data Archive Format |
| TIL file extension | NovaLogic, Inc. | Nova Logic Game Tile |
| TILESKINZIP file extension | Stardock Corporation | Elemental Tile Skin |
| TIM file extension | Sierra | The Incredible Machine Level Format |
| TINYID file extension | TinyCo | Tiny Village |
| TIR file extension | CipSoft GmbH | Tibia RePlay Tibia Movie |
| TIT file extension | Microsoft Corporation | Train Simulator Track Interactive Table |
| TJA file extension | Taikojiro | Taikojiro Song Map Format |
| TJC file extension | Taikojiro | Taikojiro Song Map Sequence Format |
| TKR file extension | Microsoft | ESignal Ticker Format |
| TLK file extension | BioWare | BioWare Talk Table Format |
| TML file extension | Blue Tongue Entertainment | Jurassic Park: Operation Genesis Dinosaur Skin |
| TOC file extension | Blizzard Entertainment | World Of Warcraft Add-on Information Format |
| TOH file extension | BioWare | Infinity Engine Game |
| TOMBRAIDER 3 file extension | Core Design | Tomb Raider 3 Save Game |
| TOR file extension | LucasArts | Star Wars: The Old Republic Asset Format |
| TOT file extension | BioWare | Bioware Infinity Game Engine Talk Table Override Text |
| TOY file extension | Ubisoft Entertainment S.A. | Catz & Dogz Game |
| TP4 file extension | Chris Sawyer Productions | RollerCoaster Tycoon Track Design Screenshot Format |
| TPJ file extension | N/A | Nova Logic Game Terrain Project |
| TRE file extension | Electronic Arts, Inc. | EA SPORTS Game |
| TRF file extension | Microsoft Corporation | Train Simulator Traffic Pattern |
| TRK file extension | Ubisoft Entertainment | Pacific Fighters Offline Track Format |
| TSC file extension | Daisuke Amaya | Cave Story Script |
| TSD file extension | NovaLogic, Inc. | NovaLogic Game Tile Surface Define |
| TTARCH file extension | Telltale Games | Telltale Games Game Data Format |
| TTARCH2 file extension | Telltale, Inc. | The Walking Dead Season Two Game Data |
| TTG file extension | Electronic Arts, Inc. | Command & Conquer Red Alert 3 |
| TTH file extension | White Wolf | Vampire - Bloodlines Game |
| TTM file extension | Tower Toppler | Tower Toppler Level Format |
| TTZ file extension | White Wolf | Vampire The Masquerade |
| TUNEAO file extension | Bungie.org | Marathon 2 Aleph One |
| TUT file extension | Tilted Mill Entertainment | Children Of The Nile Tutorial Format |
| TVC file extension | Gas Powered Games | Dungeon Siege |
| TWT file extension | N/A | Carmageddon 2 Carpocalyse Now Saved Game Format |
| TXB file extension | Electronic Arts, Inc. | Fifa 2001 Data Environment |
| TXC file extension | Eidos Interactive Ltd. | Urban Chaos Game |
| TXI file extension | LucasArts Entertainment Company, LLC | KOTOR2 Game |
| TXTR file extension | N/A | The Sims Texture |
| U file extension | N/A | Unreal Tournament System Format |
| U00 file extension | Ludia Inc. | The Price Is Right 2010 Game |
| U2CAR file extension | N/A | NFS:U2 Car |
| UAX file extension | N/A | Unreal Audio Format |
| UC file extension | N/A | UnrealScript Class |
| UCL file extension | Tripwire Interactive | Killing Floor System Format |
| UCM file extension | Viva Media | Urban Chaos Game Format |
| UCS file extension | Relic Entertainment Inc. | Homeworld Localized Unicode Strings |
| UDK file extension | Epic Games | Unreal Map Format |
| UDM file extension | MotCreations.com | MapView User Module |
| UFX file extension | Ultimate 3D | Ultimate 3D Game Engine Material |
| UGD file extension | Electronic Arts, Inc. | Need For Speed Underground |
| UHTM file extension | Epic Games, Inc. | Unreal Tournament |
| UKA file extension | Electronic Arts, Inc. | Fifa World Cup Game Data |
| UKX file extension | Epic Games | Unreal Tournament Animation Format |
| UMOD file extension | Epic Games | Unreal Tournament MOD Installation Package Format |
| UMX file extension | Epic Games | Unreal Tournament Music Package |
| UNCOMPRESSED_SIZE file extension | Raven Software | Singularity Game |
| UNITXT file extension | N/A | YS FLIGHT Language |
| UNITY file extension | Unity Technologies | Unity Scene Format |
| UNITY3D file extension | Unity Technologies | Unity Scene Web Player Format |
| UNIT_VARIANT file extension | The Creative Assembly | Total War Unit Variant Settings |
| UNR file extension | N/A | Unreal Map Format |
| UOP file extension | Electronic Arts | Ultima Online Patch Format |
| UPDATR file extension | Nijikokun | IConomy Update Format |
| UPK file extension | Epic Games | Unreal 3 Game Data Package Format |
| UPK0 file extension | 4A Games | Metro 2033 Game |
| UQM file extension | The Ur-Quan Masters | The Ur-Quan Masters Archive Format |
| US file extension | Capcom Co., Ltd. | Monster Hunter Freedom Unite US Region Save Game |
| USA file extension | Epic Games | Unreal Saved Game Format |
| USS file extension | N/A | WinUAE Saved State |
| USX file extension | N/A | Unreal StaticMesh (hardware Brushes) Format |
| UT2 file extension | Epic Games | Unreal Tournament Map Format |
| UT2MOD file extension | Epic Games | Unreal Tournament 2003 MOD Installation Package Format |
| UT3 file extension | Epic Games | Unreal Tournament 3 Map Format |
| UT4MOD file extension | Epic Games | Unreal Tournament 2004 MOD Installation Package Format |
| UT8 file extension | Sick Puppies | Ghost Master Language Format |
| UTB file extension | Microsoft Studios | Microsoft Flight Simulator X Traffic |
| UTC file extension | BioWare | BioWare Aurora Game Engine Creature Format |
| UTD file extension | BioWare | BioWare Aurora Game Engine Door |
| UTE file extension | BioWare | BioWare Aurora Game Engine Encounter |
| UTI file extension | BioWare | BioWare Aurora Game Engine Item |
| UTM file extension | BioWare | BioWare Aurora Game Engine Store |
| UTP file extension | BioWare | BioWare Aurora Game Engine Placeable Object |
| UTS file extension | BioWare | BioWare Aurora Game Engine Sound |
| UTT file extension | BioWare | BioWare Aurora Engine Trigger |
| UTW file extension | Aubrey Falconer | Unity Whirld Format |
| UTX file extension | N/A | Unreal Texture Format |
| UVX file extension | Epic Games | Unreal Tournament Saved Game |
| UXX file extension | N/A | Unreal Tournament 2003 Cache Format |
| UZ2 file extension | Epic Games, Inc. | Unreal Tournament Compressed |
| V64 file extension | N/A | Nintendo 64 Emulation ROM Image Format |
| VB file extension | N/A | Microsoft Visual Studio Visual Basic Script Format |
| VCM file extension | LithJoe | Grand Theft Auto Vice City Mod Manager Format |
| VDF file extension | Piranha Bytes | Gothic Game Data Format |
| VDK file extension | Gravity Interactive Inc. | Ragnarok 2 Game |
| VEF file extension | BioWare | Infinite Game Engine Visual Effects |
| VEH file extension | Terminal Reality | Fly! Vehicle Description |
| VEXPORTER file extension | Firefly Studios Ltd. | Stronghold 3 Editor |
| VFE file extension | Valve Corporation | Left 4 Dead |
| VFI file extension | 4A Games | Metro 2033 Game |
| VFN file extension | Firefly Studios Ltd. | Stronghold 3 Data |
| VFS1 file extension | 4A Games | Metro 2033 Game |
| VGI file extension | Vista Game Explorer Editor | Vista Game Information |
| VHV file extension | Valve | Half-Life 2 Lighting Format |
| VIB file extension | Monolith Productions, Inc. | F.E.A.R. 2 Game |
| VIS file extension | N/A | Microsoft Flight Simulator Visibility Image Format |
| VIV file extension | Sony | PlayStation Video Format |
| VL2 file extension | Sierra Entertainment, Inc. | Tribes 2 Game |
| VMF file extension | Valve | Valve Map Format |
| VMV file extension | VirtuaNES | VirtualNES Or VisualBoyAdvance Format |
| VMX file extension | Valve | Valve Map Backup Format |
| VO2 file extension | Celestial Impact team | Celestial Impact Map |
| VOB file extension | Live for Speed | Live For Speed Car Format |
| VOL file extension | N/A | Video Game Archive |
| VP file extension | Descent Network Team | Volition Package Format |
| VPCACHE file extension | Randy Davis | Visual Pinball Rendered Table Cache |
| VPK file extension | Valve | Steam NCF Valve Pak Archive Format |
| VPP_PC file extension | Volition Inc. | Saints Row 2 Game |
| VQA file extension | Westwood Studios (EA) | Command And Conquer Game Video Files |
| VSHADERBIN file extension | Firefly Studios Ltd. | Stronghold 3 Shader |
| VTF file extension | N/A | Valve Texture Format |
| VVC file extension | BioWare | Infinity Game Engine Visual Spell Casting Effects |
| VVS file extension | Atari, Inc. | Driver 3 Game Data |
| VVVVVV file extension | VVVVVV | VVVVVV Game Map Format |
| VXL file extension | Electronic Arts, Inc. | Tiberian Sun Voxel Animation Format |
| W3G file extension | Blizzard Entertainment | Blizzard Warcraft III Game Replay Format |
| W3I file extension | Blizzard Entertainment, Inc. | Warcraft III Map Related |
| W3M file extension | Blizzard Entertainment | Warcraft 3 Map Format |
| W3N file extension | Blizzard Entertainment | Warcraft 3 Frozen Throne Campaign Format |
| W3P file extension | Blizzard Entertainment, Inc. | Warcraft 3 Progress |
| W3U file extension | Blizzard Entertainment, Inc. | Warcraft 3 Custom Units |
| W3V file extension | Blizzard Entertainment, Inc. | Warcraft 3 Campaign Progress Record |
| W3X file extension | Blizzard Entertainment | Blizzard Warcraft III Expansion Map Format |
| W3Z file extension | Blizzard Entertainment | Blizzard Warcraft III Saved Game Format |
| WA2 file extension | Midnight Synergy | Wonderland Adventures Custom Game Format |
| WAC file extension | N/A | Nova Logic Game Boolean Logic Commands |
| WAD file extension | N/A | Wally Game Texture Archive |
| WAG file extension | Microsoft Corporation | Train Simulator Wagon |
| WAGAME file extension | Team 17 | Worms Armageddon Game Replay |
| WAI file extension | Blizzard Entertainment, Inc. | Warcraft 3 AI Data |
| WAL file extension | N/A | Quake 2 Texture Image Format |
| WB file extension | Electronic Arts, Inc. | FIFA 2000 |
| WBFS file extension | Waninkoko | Nintendo Wii Backup Format System Format |
| WBT file extension | Nabi Studios | Toribash Help Format |
| WD file extension | Jelsoft Enterprises Ltd. | Earth 2140-2160 Game Archive |
| WD1 file extension | N/A | Earth 2150 Introduction Movie |
| WDB file extension | Blizzard Entertainment | World Of Warcraft Cache Format |
| WDF file extension | Wiimm | Wiimm Nintendo Wii Disc Format |
| WDR file extension | LucasArts Entertainment Company, LLC | Star Wars: Tie Fighter Media |
| WE file extension | Electronic Arts, Inc. | Fifa2000 Be Game |
| WEAP file extension | id Software | Quake 3 Id Tech 3 Game Engine Weapon Format |
| WED file extension | BioWare | BioWare Infinity Game Engine Graphic Display Info |
| WEP file extension | WebWorks | EPublisher Stationery Design Project |
| WF file extension | Electronic Arts, Inc. | FIFA 2000 Play |
| WFX file extension | BioWare | Infinity Engine Audio |
| WG file extension | Electronic Arts, Inc. | Fifa 2000 Game |
| WGAMEPROFILE file extension | Activision | X-Men Origins: Wolverine Profile |
| WGF file extension | The Widelands Development Team | Widelands Game Format |
| WHD file extension | Xport | WinUAEX Amiga Game ROM |
| WHIRLD file extension | Aubrey Falconer | Unity Whirld Format |
| WHM file extension | Relic Entertainment Inc. | Warhammer 40,000: Dawn Of War Model |
| WICSAVEGAME file extension | Massive Entertainment AB | World In Conflict Saved Game |
| WJ file extension | Electronic Arts, Inc. | Fifa 2000 Game |
| WL1 file extension | id Software | Wolfenstein 3D Shareware Version Format |
| WL3 file extension | id Software LLC | Wolfenstein 3D Registered Version |
| WL6 file extension | id Software | Wolfenstein 3D Registered Version Format |
| WLD file extension | Re-Logic | Terraria World Format |
| WMF file extension | The Widelands Development Team | Widelands Map Format |
| WMO file extension | Blizzard Entertainment | World Of Warcraft WoW Map Object |
| WNT file extension | Raven Software | Soldier Of Fortune II Waypoint |
| WOLFQUEST file extension | Minnesota Zoo | WolfQuest Saved Game |
| WOP file extension | Midnight Synergy | Wonderland Adventures Object Preset Format |
| WORLD file extension | WorldPainter | WorldPainter Minecraft Map Format |
| WOTREPLAY file extension | Wargaming.net | World Of Tanks Battle Recording Format |
| WOWPREPLAY file extension | Wargaming.net | World Of Warplanes Replay |
| WPM file extension | Blizzard Entertainment | Warcraft 3 Path Map Format |
| WPT file extension | Wouter van Oortmerssen | Cube 2 Waypoint Format |
| WRPL file extension | The Widelands Development Team | Widelands Saved Game Format |
| WRPLWGF file extension | The Widelands Development Team | Widelands Initial Saved Game Format |
| WSO file extension | Electronic Arts, Inc. | Sims 3 Mesh |
| WSS file extension | Bohemia Interactive | Operation Flashpoint Sound |
| WTD file extension | Rockstar Games | Grand Theft Auto IV Textures Format |
| WTF file extension | Blizzard Entertainment | World Of Warcraft Server Configuration Text Format |
| WTP file extension | Relic Entertainment Inc. | Warhammer 40k Dawn Of War Texture |
| WWP file extension | Team17 Software Limited | Worms World Party Teams |
| WX file extension | Microsoft | Flight Simulator Weather Format |
| WXD file extension | Relic Entertainment Inc. | Homeworld Musc Resource Game |
| WZ file extension | NEXON | MapleStory Game Data Archive |
| X13 file extension | Darxabre | Hooligans Game Archive |
| XAC file extension | Electronic Arts, Inc. | SimCity Societies Game |
| XADML file extension | Cloanto Italia srl | Amiga Forever XADML |
| XAN file extension | Team17 Software | Worms 3D Map Format |
| XARC file extension | Funcom | The Longest Journey Audio |
| XBE file extension | Microsoft | Xbox Executable Format |
| XBF file extension | Electronic Arts, Inc. | Emperor Battle For Dune |
| XBMP file extension | Midway Home Entertainment Inc. | Area 51 Game |
| XBSAV file extension | Electronic Arts | Mass Effect 2 For Xbox Saved Game Format |
| XCR file extension | Enlight Software. Ltd. | Warlords Battlecry Game |
| XDS file extension | Invisionsoft | Nintendo DS Game Maker Project Format |
| XEN file extension | Activision | Activision Guitar Hero 3 Data Format |
| XEX file extension | Microsoft | Xbox 360 Executable Format |
| XFBIN file extension | CyberConnect2 | Naruto Shippuden: Ultimate Ninja Storm 2 |
| XGA file extension | Imagine Sports | Diamond Mind Baseball Game Account Information |
| XMB file extension | Microsoft | Microsoft Age Of Empires Game Data Format |
| XMG file extension | Funcom | The Longest Journey XMG |
| XNB file extension | Microsoft | XNA Game Studio Express XNA Framework Content Pipeline Binary Format |
| XOM file extension | Team 17 Software | Worms 3D Object Format |
| XP2 file extension | XPilot NG | XPilot NG |
| XP3 file extension | KiriKiri | KiriKiri Package Format |
| XP4 file extension | KiriKiri | KiriKiri Package |
| XPAC file extension | Sega Corporation | Sonic & Sega All-Stars Racing For PC Game Audio Archive |
| XPD file extension | Sony | PlayStation Store PSP License Format |
| XPK file extension | THQ | WWE RAW Model Format |
| XRD file extension | N/A | Core Wars Data |
| XS file extension | Microsoft | Age Of Empires 3 Map AI Generator Format |
| XSM file extension | Electronic Arts, Inc. | SimCity Societies Game |
| XTL file extension | Pterodon | Vietcong Game Data Format |
| XVMCONF file extension | XVM | World Of Tanks Configuration Format |
| XWC file extension | Starbreeze | Starbreeze Sound |
| XWI file extension | LucasArts Entertainment Company, LLC | Star Wars: X-Wing Mission |
| Y3A file extension | Konami | Yu-Gi-Oh! Online Avatar Format |
| Y3D file extension | Konami | Yu-Gi-Oh! Online Card Format |
| Y3P file extension | Konami Corporation | Yu-Gi-Oh! Online Profile |
| Y3T file extension | Konami Corporation | Yu-Gi-Oh! Online Tag |
| YAR file extension | Atari, Inc. | Castles & Catapults Game |
| YCM file extension | Super Simple Games | Yugioh Card Maker Format |
| YDC file extension | Konami | Konami Yu-Gi-Oh! Card Deck Format |
| YDR file extension | Konami | Yu-Gi-Oh! Power Of Chaos Replay Format |
| YDT file extension | Konami | Konami Yu-Gi-Oh! Power Of Chaos Data Format |
| YFS file extension | YSFLIGHT.com | YSFLIGHT Mission Format |
| YIF file extension | N/A | Mungyodance Game Data |
| YRM file extension | Electronic Arts, Inc. | Red Alert 2: Yuris Revenge Multiplayer Map |
| YRP file extension | YGOPro Project | YGOPro Replay |
| Z2 file extension | SourceForge.net | Infocom Game Module For Z-machine Version 2 |
| Z2F file extension | Microsoft | Zoo Tycoon 2 Game Format |
| Z3 file extension | SourceForge.net | Infocom Game Module For Z-machine Version 3 |
| Z4 file extension | SourceForge.net | Infocom Game Module For Z-machine Version 4 |
| Z5 file extension | SourceForge.net | Infocom Game Module For Z-machine Version 5 |
| Z6 file extension | SourceForge.net | Infocom Game Module For Z-machine Version 6 |
| Z64 file extension | N/A | Nintendo 64 Game ROM |
| Z7 file extension | SourceForge.net | Infocom Game Module For Z-machine Version 7 |
| Z8 file extension | Infocom | Infocom Game Module For Z-machine Version 8 |
| Z80 file extension | N/A | ZX Spectrum Emulator Memory Snapshot |
| ZA file extension | Destineer Publishing Corp. | Game |
| ZAR file extension | Sony Corporation | Sony PlayStation 2 Audio |
| ZBD file extension | Activision | MechWarrior 3 Snow Fields |
| ZBLORB file extension | N/A | Z-code Game |
| ZCA file extension | Gravity Interactive Inc. | ROSE Online |
| ZCACHE file extension | N/A | Venture The Void Cache |
| ZD2 file extension | Zillions Development Corp. | Zillions Of Games Locked Rules |
| ZDS file extension | GZDoom | GZDoom Save Format |
| ZEI file extension | Ubisoft Entertainment S.A. | ANNO 1602 Game |
| ZFS file extension | Activision | Interstate 76 And 82 Game Archive |
| ZGEPROJ file extension | N/A | ZGame Editor Project |
| ZGP file extension | Armaggedon Games | Zelda Classic Graphics Pack |
| ZIP file extension | The MAME Team | Game Resource Archive Format |
| ZIPFS file extension | ValuSoft | 18 Wheels Of Steel: Across America Game |
| ZIPO file extension | RadicalPlay.com | Need For Madness Game Data |
| ZM4 file extension | ZSNES Development Team | ZSNES Movie #4 |
| ZM5 file extension | ZSNES Development Team | ZSNES Movie #5 |
| ZM6 file extension | N/A | ZSNES Movie #6 |
| ZM7 file extension | N/A | ZSNES Movie #7 |
| ZM8 file extension | N/A | ZSNES Movie #8 |
| ZM? file extension | ZSNES Development Team | ZSNES Movie |
| ZMAP file extension | Konami | Zombies Ate My Neighbours Map Format |
| ZMD file extension | Gravity Interactive Inc. | ROSE Online Model Bones |
| ZMO file extension | Gravity Interactive Inc. | ROSE Online Model Animation |
| ZMS file extension | Gravity Interactive Inc. | ROSE Online Model |
| ZOO file extension | Microsoft | Zoo Tycoon Game Format |
| ZRF file extension | Zillions Development Corp. | Zillions Rules |
| ZRS file extension | N/A | Hearts Game |
| ZS0 file extension | ZSNES | ZSNES Slot 0 Saved State Format |
| ZS1 file extension | ZSNES | ZSNES Slot 1 Saved State Format |
| ZS2 file extension | ZSNES | ZSNES Slot 2 Saved State Format |
| ZS3 file extension | ZSNES | ZSNES Slot 3 Saved State Format |
| ZS4 file extension | ZSNES | ZSNES Slot 4 Save State Format |
| ZS5 file extension | ZSNES | ZSNES Slot 5 Saved State Format |
| ZS6 file extension | ZSNES | ZSNES Slot 6 Saved State Format |
| ZS7 file extension | ZSNES | ZSNES Slot 7 Saved State Format |
| ZS8 file extension | ZSNES | ZSNES Slot 8 Saved State Format |
| ZS9 file extension | ZSNES | ZSNES Slot 9 Saved State Format |
| ZSC file extension | Gravity Interactive Inc. | ROSE Online Zscript |
| ZSD file extension | Acclaim Entertainment | Dave Mirra Freestyle BMX Data |
| ZSE file extension | Armaggedon Games | Zelda Sound Effects |
| ZSG file extension | Zillions Development Corp. | Zillions Of Games Game |
| ZST file extension | ZSNES | ZSNES Save Format |
| ZTD file extension | Microsoft | Zoo Tycoon Game Format |
| ZTMP file extension | Valve | Steam Compressed Game Resource Format |
| ZX file extension | N/A | KGB ZX Spectrum Emulator Snapshot |
| ZXT file extension | Zeljko Juric and Samir Ribic | ZX Spectrum Emulator |
| ZZZ file extension | Lionhead Studios | Black & White Game Data Format |
Web Developer acting on his own, author of Internet solutions facilitating working with new technologies for less advanced users. Internet maniac.
