| Name | Types | |
|---|---|---|
| TJ Lagasse | Developer | |
| TJ Lounge | Developer | |
| TJ Yatchum | Developer | |
| TK | Developer | |
| TK Studio | Developer | |
| TK07 | Developer | |
| TKDArts | Developer | |
| TKO Software | Developer | |
| TL-TONIC | Developer | |
| TLAS Studios | Developer | |
| TLS | Developer | |
| TLansdale | Developer | |
| TLee | Developer | |
| TM Games | Publisher | |
| TMF | Developer | |
| TMQ Software | Developer | |
| TMS | Developer | |
| TMS Entertainment | Publisher | |
| TMSIgames | Developer | |
| TMV | Developer | |
| TMW2 | Developer | |
| TNERB | Developer | |
| TNJGames | Developer | |
| TNN | Publisher | |
| TNS | Developer | |
| TNS Co. | Developer | |
| TNT Team | Developer | |
| TNTC-Lab | Developer | |
| TOASTEngineer | Developer | |
| TOITA | Developer | |
| TOKYOTOON | Developer | |
| TOM Productions | DeveloperPublisher | |
| TOMCREATE | DeveloperPublisher | |
| TOMERPG | Developer | |
| TOMY | Publisher | |
| TOQ Games | Developer | |
| TOR WAR | Developer | |
| TORA GROUP | Developer | |
| TORTURE STAR VIDEO | Developer | |
| TOSE | DeveloperPublisher | |
| TOSE Co., Ltd. | Developer | |
| TOTM Studio | DeveloperPublisher | |
| TOXIC33 | Developer | |
| TOXWORKS | Developer | |
| TPBstudios | Developer | |
| TPHRyan | Developer | |
| TPM_Football | Developer | |
| TPZD | Developer | |
| TQ Digital Entertainment | Developer | |
| TQAG | DeveloperPublisher | |
| 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 |