| title | developer | year | platform | | pop. |
|---|
| UFO: Afterlight | ALTAR Games | 2007 | Windows | strategy role-play Science Fiction | image | subject | label | |
| UFO: Extraterrestrials | Chaos Concept | 2007 | Windows | strategy turn-based Science Fiction | image | subject | label | |
| Ultima IX: Ascension | Origin | 1999 | Windows | action/reflex role-play Fantasy | image | subject | label | |
| Unreal II – The Awakening | Legend Entertainment | 2003 | Windows | shooter Science Fiction | image | | label | |
| VDrift | VDrift | 2005 | Linux | racing/driving | image | | label | |
| Vulture Strike | Vulture Strike | 2017 | Linux | | | | label | |
| Warhammer 40,000: Dawn of War II Chaos Rising | Feral Interactive | 2016 | Linux | action/reflex strategy role-play Fantasy | | | label | |
| Warmonger | NetDevil | 2007 | Windows | shooter Science Fiction | image | | label | |
| Widescreen Asteroids | Richcraft Creations | 2017 | Linux | action/reflex shooter Science Fiction | image | subject | label | |
| World in Conflict | Massive Entertainment | 2007 | Windows | strategy | image | | label | |
| World of Goo | 2D BOY | 2008 | Linux | puzzle Cartoon | image | subject | label | |
| WorldShift | Black Sea Studios | 2008 | Windows | strategy Fantasy | image | subject | label | |
| X-Blades | Gaijin Entertainment | 2007 | Windows | action/reflex beat 'em up Fantasy | image | | label | |
| X-Blades | Gaijin Entertainment | 2016 | Linux | action/reflex beat 'em up Fantasy | | | label | |
| X-COM: Enforcer | Microprose | 2001 | Windows | action/reflex shooter Science Fiction | image | | label | |
| X³: Reunion | Egosoft | 2005 | Windows | action/reflex simulation flight manag./econ. adventure Science Fiction | image | | label | |
| XInvaders | author | 2000 | Linux | shooter Science Fiction | image | subject | label | |
| XInvaders | author | 2000 | Unix | shooter Science Fiction | | | label | |
| XInvaders | author | 2000 | BSD | shooter Science Fiction | | | label | |
| Zeno Clash | ACE Team | 2009 | Windows | action/reflex beat 'em up shooter Fantasy | image | | label | |
| Zombie Driver | Exor Studios | 2009 | Windows | action/reflex racing/driving | image | | label | |
