| wnv | Grand Theft Auto V Navmesh Data |
| wo2 | Gothic II Game Data |
| wolfquest | WolfQuest Saved Game |
| wooxy | League of Legends Wooxy Skin |
| world | WorldPainter File |
| wotmod | World of Tanks Modification Data |
| wotreplay | World of Tanks Replay |
| wowpreplay | World of Warplanes Replay |
| wowpreport | World of Warplanes Report |
| wpak | Shadowbane: Throne of Oblivion Data |
| wrm | WormWorld Level Data |
| wrpl | War Thunder Saved Replay |
| wrpl | Widelands Saved Replay |
| wrs | Bagger Simulator WRS Archive |
| ws | The Witcher 2 Game Script |
| wsc | Worms Armageddon Scheme Data |
| wso | The Sims 3 Mesh Data |
| wss | Operation Flashpoint Audio Data |
| wtd | GTA 4 Texture Data |
| wtf | World of Warcraft Config |
| wtp | Warhammer 40000: Dawn of War Texture |
| wwp | Worms World Party Teams Data |
| 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 |
