| Name | Types | |
|---|---|---|
| TQworld, LLC. | Publisher | |
| TR8 Torus Studios | Developer | |
| TRANS Fiction Systems | Developer | |
| TREEN | Developer | |
| TREVA | Publisher | |
| TREVA Entertainment | DeveloperPublisher | |
| TRI SYNERGY | Publisher | |
| TRI Synergy | Publisher | |
| TRIALITY GAMES | Developer | |
| TRIUMPH CORPORATION | Developer | |
| TRIX | Developer | |
| TROOOZE | Publisher | |
| TRRP | Developer | |
| TRU FUN Entertainment | Developer | |
| TRy Dev | Developer | |
| TSFlareon | Developer | |
| TSR | Publisher | |
| TSchindlinger | Developer | |
| TStone | Developer | |
| TT | Developer | |
| TT Fusion | Developer | |
| TT Games | DeveloperPublisher | |
| TT Games Publishing | Publisher | |
| TTI | Publisher | |
| TTI (US) | Publisher | |
| TTI(US) | Publisher | |
| TTIME Technology | Publisher | |
| TTMead | Developer | |
| TTouchette | Developer | |
| TU Delft | Developer | |
| TV Asahi | Developer | |
| TV Games | Publisher | |
| TV Tokyo | Publisher | |
| TV-ROM | Developer | |
| TW Games | Developer | |
| TWISTED-DOCTOR | Developer | |
| TWLF | Developer | |
| TWO PIGS STUDIO | Developer | |
| TWP | Developer | |
| TWings | Developer | |
| TXead | Developer | |
| TYO | DeveloperPublisher | |
| TYOJP | Publisher | |
| TYPH3U5 | Developer | |
| T_Dogs | Publisher | |
| TaTooKa | Developer | |
| TabDulApp | Developer | |
| TabKimpton | Developer | |
| TabbbyWright | Developer | |
| Tabby | Developer |