| 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 |
