| Thinking Cap Software | Publisher | |
| Thinking Frog Studios | Developer | |
| Thinking Machine Associates | DeveloperPublisher | |
| Thinking Rabbit | DeveloperPublisher | |
| Thinking Tools | Developer | |
| ThinkingMicrowave | Developer | |
| ThinkingStars | DeveloperPublisher | |
| Third Law Entertainment | Developer | |
| Third Law Interactive | Developer | |
| Third Party Software | Publisher | |
| Third Rock Games | Developer | |
| Third Wave Games | DeveloperPublisher | |
| Third Wire Productions | DeveloperPublisher | |
| Third-I Productions | Publisher | |
| ThirstyPenguin | Developer | |
| Thirty Three Games | Developer | |
| ThirtyThree | Developer | |
| ThirtysixLab | Developer | |
| This Side of Me | Developer | |
| ThisGooch | Developer | |
| ThisPersonDoesNotExist_Games | Developer | |
| Thob | Developer | |
| Thola studio | Developer | |
| ThomW | Developer | |
| Thomas | Developer | |
| Thomas B. Hardy | Developer | |
| Thomas Ball (computer scientist), | Developer | |
| Thomas Biskup | DeveloperPublisher | |
| Thomas Bowker | Developer | |
| Thomas Chassin | Developer | |
| Thomas Feichtmeir Cyangmou | Developer | |
| Thomas Gervraud | Developer | |
| Thomas Gittelbauer | Developer | |
| Thomas Guitton | Developer | |
| Thomas Haaks (Right Angle Games) | Developer | |
| Thomas Happ Games | DeveloperPublisher | |
| Thomas Huang | Developer | |
| Thomas L. | Developer | |
| Thomas Lean | Developer | |
| Thomas Lehnert | Developer | |
| Thomas Lessa | Developer | |
| Thomas Ling | Developer | |
| Thomas Manuel | Developer | |
| Thomas Martin | Developer | |
| Thomas Mathys | Developer | |
| Thomas Mazzaferro | Developer | |
| Thomas Moon Kang | Developer | |
| Thomas Nichols | Developer | |
| Thomas Noone & Patrick Noone | Developer | |
| Thomas Olsson | Developer | |