| wtp | Warhammer 40000: Dawn of War Texture |
| wu8 | Mario Kart Wii Wiimm U8 Data |
| wwp | Worms World Party Teams Data |
| www | Anno 2070 World Configuration |
| wx | MS Flight Simulator Weather File |
| wxd | Homeworld Game Data |
| wxh | Homeworld Sound Control Data |
| wxy | LoL Wooxy Skin Data |
| wz | MapleStory WZ Package |
| wz | Warzone 2100 Data |
| wzg | WZebra Game Data |
| wzl | Winzle Puzzle |
| x13 | Hooligans game archive file |
| xa | The Sims Audio Data |
| xac | SimCity Societies Game Data |
| xaf | Beat Down Game Data |
| xai | Ys VIII XAST Archive |
| xan | Worms 3D Map |
| xarc | The Longest Journey Audio Data |
| xbf | Emperor: Battle for Dune Game Data |
| xbg | Watch Dogs XBG Model |
| xbmp | Area 51 Game Data |
| xbn | Final Fantasy 4 UI Layout Data |
| xbr | Azurik: Rise Of Perathia Data |
| xbsav | Mass Effect 2 for Xbox Saved Game |
| xbw | Unreal Championship 2: The Liandri Conflict Data |
| xcr | Warlords Battlecry Game Data |
| xd | The Dark Mod eXternal Data |
| xdu | The Suffering: Ties That Bind Game Data |
| xen | Guitar Hero III Data |
