U
- U55 - End of the Line
- UberSoldier 2
- UberStrike
- Ubisoft
- UEVR
- Ugo Volt
- Ultimate Chicken Horse
- ULTRAKILL
- Ultra Space Battle Brawl
- Unawake
- Undead: The Last Refuge
- UnDead Online
- Under
- Under ash
- Under Siege
- Underworld Ascendant
- UNFOLLOW
- Unfortunate Spacemen
- Unholy
- UNITED 1944
- Universal Combat: Hostile Intent
- Unkilled
- Unreachable
- Unreal
- Unreal 2: The Awakening
- Unreal 4
- Unreal Championship
- Unreal Championship 2: The Liandri Conflict
- Unreal Tournament 3
- Unreal Tournament 1999
- Unreal Tournament 2003
- Unreal Tournament 2004
- Unreal Tournament 2014
- Unreal Xbox 2
- Unrecord
- Unruly Heroes
- Untitled FPS
- Unturned
- Unvanquished
- Uplay
- Urban Chaos: Riot Response
- Urban Dominion
- Urban Explorer
- Urban Terror HD
- Utopia City
- Utopia Industrial