Companies
- Turtle Beach
- Turtle Rock Studios
- Tuxedo Labs
- Twin Galaxies International
- Twisted Pixel Games, LLC
- Twisted Tree Games
- Twitch
- Two Point Studios
- Two Tribes
- Type-Moon
- U4ia Games
- Uber
- Uber Entertainment
- Ubisoft
- Ubisoft Annecy
- Ubisoft Australia
- Ubisoft Blue Byte
- Ubisoft Bordeaux
- Ubisoft Chengdu
- Ubisoft Entertainment
- Ubisoft Massive
- Ubisoft Milan
- Ubisoft Montpellier
- Ubisoft Montreal
- Ubisoft Paris
- Ubisoft Quebec
- Ubisoft Quebec City
- Ubisoft Red Storm
- Ubisoft Reflections
- Ubisoft San Francisco
- Ubisoft Shanghai
- Ubisoft Singapore
- Ubisoft Sofia
- Ubisoft Toronto
- UFC
- UFO Interactive Games
- UIEvolution
- UIG Entertainment
- Ultimate Games
- Ultra Ultra
- Ultrahorse
- Undead Labs
- Under the Stairs
- Underground Developments
- UNIANA
- united front
- United Front Games
- United Game Artists
- Unity
- Unity 3D