| tri-Ace |
| Tri-Crescendo |
| Trion Worlds |
| Tripwire Interactive |
| Triumph Studios |
| Troika |
| Turbine Entertainment Software |
| Turn 10 |
| Turtle Rock Studios |
| Twisted Pixel Games |
| U.S. Army |
| Ubisoft |
| Ubisoft Bucharest |
| Ubisoft Montpellier |
| Ubisoft Montreal |
| Ubisoft Paris |
| Ubisoft Quebec City |
| Ubisoft Reflections |
| Ubisoft Romania |
| Ubisoft Shanghai |
| Ubisoft Sofia |
| Ubisoft Toronto |
| UFO Interactive |
| Undead Labs |
| Unique Development Studios |
| United Developers |
| United Front Games |
| Universal Interactive |
| Upfall Studios |
| Upper One Games |
| Uppercut Games |
| Valcon Games |
| Valve |
| Vanilla Ware |
| Vanpool |
| Vatra Games |
| VBlank Entertainment Inc. |
| VectorCell |
| Vectorcom Development |
| Venan Entertainment |
| Venom Games |
| Verant Interactive |
| Vicarious Visions |
| Vicious Cycle |
| Victory Games |
| Vigil Games |
| Vingt-et-un-Systems |
| Vir2L Studios |
| VIS Entertainment |
| Visceral Games |
| Visual Concepts |
| Viva Media |
| Vivendi |
| Vlambeer |
| Vogster Entertainment |
| Void Star Creations |
| Volatile Games |
| Volition, Inc. |
| Voltex, Inc. |
| VSTEP |
