- Unikware
- Unikgame
- Untame
- Underdog Games
- Ultravision Interactive
- UFO Crash Games
- Unseen Kingdom Games
- Unseen Kingdom Studios
- Up All Night Games
- UziGames
- Unnamed Fiasco Team
- UNIT9
- UnitedIndie
- upjers
- Ubisoft Romania
- uegamestudio
- Unlok
- UnexEvo
- Ultra Runaway Games
- u̷n̸k̴n̶o̴w̶n̵
- Ubisoft Reflections
- Unfinished Pixel
- Universe
- Unwhale Studio