| wgl | The Games: Winter Challenge Tournament Data |
| wgm | Chalk Data |
| wgp | Wild Board Games Data |
| wgpkg | World of Tanks Update Package |
| whe | Warhammer 40000: Dawn of War Data |
| whirld | Unity v4 Whirld Package |
| whm | Warhammer 40000: Dawn of War Model Data |
| wia | Colin McRae: DiRT Data |
| wip | Colin McRae: DiRT Data |
| wix | Xara Internal Graphics Data |
| wj | FIFA 2000 Game Data |
| wl1 | Wolfenstein 3D Game Data |
| wl3 | Wolfenstein 3D Registration Data |
| wmo | World of Warcraft World Model Object |
| wmw | Armobiles Data File |
| wnt | Soldier of Fortune II Waypoint Data |
| wnv | Grand Theft Auto V Navmesh Data |
| wo2 | Gothic II Game Data |
| wooxy | League of Legends Wooxy Skin |
| world | WorldPainter File |
| wotreplay | World of Tanks Replay |
| wpak | Shadowbane: Throne of Oblivion Data |
| wrpl | Widelands Saved Replay |
| wrs | Bagger Simulator WRS Archive |
| wtd | GTA 4 Texture Data |
| wtf | World of Warcraft Config |
| wtp | Warhammer 40000: Dawn of War Texture |
| www | Anno 2070 World Configuration |
| wx | MS Flight Simulator Weather File |
| wxd | Homeworld Game Data |
| wxy | League of Legends Wooxy Skin |
| wz | MapleStory WZ Package |
| wzg | WZebra Game Data |
| wzl | Winzle Puzzle |
| xai | Ys VIII XAST Archive |