| 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 | |
| Taber | Developer | |
| Tabitha Nikolai | Developer | |
| TabloidA | Developer | |
| Tabot | Developer | |
| Tabot Inc. | Developer | |
| Tachyon | Developer | |
| Tachyon Developers | Developer | |
| Tachyon Five | Developer | |
| Tachyon Studios | Developer | |
| TachyonTollman | Developer | |
| TackerTacker | Developer | |
| Tackorama | DeveloperPublisher | |
| Taco Bell | Publisher | |
| Taco El Gato Comics | Developer | |
| Taco Salad | Developer | |
| Tacodog64 | Developer | |
| Tacoma | Developer | |
| Tacs Games | DeveloperPublisher | |
| Tactel Hologram | Developer | |
| Tactical Design Group | Developer | |
| Tactical Development | Developer | |
| TacticalAirHorse | Developer | |
| TacticalOcelots | Developer | |
| TacticianDaraen | Developer | |
| Tactics | Developer | |
| Tactikal224 | Developer | |
| Tad Corporation | Developer | |
| Tad Oner | Developer | |
| Tad Patterson | Developer | |
| Tadej | Developer | |
| Tadpole Interactive | Developer | |
| Tae.exe Team | Developer | |
| TaeSteez33 | Developer | |
| TaelsDaFoox | Developer | |
| TaffSystem | Publisher | |
| Taffy Entertainment | Developer | |
| TaftPunk | Developer | |
| Tag Team Games | Developer | |
| Tago Electronics | Publisher | |
| Taha GOZUBUYUK | Developer | |
| TahaSalman | Developer | |
| Tahitiboi | Developer | |
| Tahoe Software | Developer | |
| Tahoe Software Productions | Developer | |
| Tahsin Rafiey (تحسین رفیعی) | Developer | |
| Tai1 Games | Developer | |
| TaiGuy57 | Developer | |
| Taiga | Developer | |
| Taijin Media | Developer | |
| TaikiGames | Developer | |
| Tail Clap Games | Developer | |
| Tailor Bird | Developer | |
| TaintedEnergy | Developer | |
| TaintedFlameGames | Developer | |
| TaintedGames | Developer | |
| TairaGames | Developer | |
| Taissa Manuelle | Developer | |
| Taito | DeveloperPublisher | |
| Taito (JP) | Publisher | |
| Taito (NA) | Publisher | |
| Taito (license) | Publisher | |
| Taito Corporation | DeveloperPublisher | |
| Taito Corporation (JP) | Publisher | |
| Taito Corporation EU | Publisher | |
| Taito Corporation JP | Publisher | |
| Taito Corporation NA/EU | Publisher | |
| Taito Corporation NA/JP | Publisher | |
| Taito CorporationJP | Publisher | |
| Taito JP | Publisher | |
| TaitoJP | Publisher | |
| TaitoKO | Publisher | |
| TaitoNA/JP | Publisher | |
| Taiwan OXON Game Studio | Developer | |
| Taiyo | Publisher | |
| Taiyo / | Publisher | |
| Taj | Developer | |
| TajamSoft | Developer | |
| TakaBro | Developer | |
| TakaGG | Developer | |
| Takafumi | Developer | |
| Takagism | Developer | |
| Takao | Developer | |
| Takaonna | Developer | |
| Takara | DeveloperPublisher | |
| Takara (Japan) | Publisher | |
| Takara EU | Publisher | |
| Takara JP | Publisher | |
| Takara NA | Publisher | |
| Takara NA/EU | Publisher | |
| Takara Tomy | DeveloperPublisher | |
| Takara Tomy Arts | Publisher | |
| Takara and Toshiaki Ota | Publisher | |
| TakaraJP | Publisher | |
| TakaraJP,KO | Publisher | |
| TakaraNA | Publisher | |
| TakaraNA/JP | Publisher | |
| Takarajimasha | Developer | |
| Takaya | Developer | |
| Take 2 | Publisher | |
| Take 2 Interactive | DeveloperPublisher | |