| TecmoJP,NA | Publisher | |
| TecmoNA | Publisher | |
| Tecno Soft | DeveloperPublisher | |
| TecnoAnalogica | Developer | |
| Tecnoboys | Developer | |
| Tectonic Studios | Developer | |
| Tectoy | DeveloperPublisher | |
| Tectoy (Brazil) | Publisher | |
| Tectoy BR | Publisher | |
| Ted Griggs | Developer | |
| Ted Latas | Developer | |
| Ted Martens | Developer | |
| Ted Mutisya | Developer | |
| Teddy | Developer | |
| TeddyArrives | Developer | |
| TeddyDief | Developer | |
| TeddyGamesStudio | Developer | |
| Tednesday | Developer | |
| Teebowah Games | Developer | |
| Teedoubleu Games | Developer | |
| TeekyBird | Developer | |
| Teemolert | Developer | |
| Teeny Weeny Games | Developer | |
| Teeny Weeny Games Ltd. | Developer | |
| Teezah | Developer | |
| Tegan Valo | Developer | |
| Teggy Games | Developer | |
| TehRealSalt | Developer | |
| Teh_Bucket | Developer | |
| Tehkan | Publisher | |
| Tehkan Ltd. | Developer | |
| Teichiku | Publisher | |
| Teichiku Records | DeveloperPublisher | |
| Teitoku Lowliet | Developer | |
| Tejas9868 | Developer | |
| Tek 5 | Developer | |
| Teknamic Software | Developer | |
| Teknopants | Developer | |
| Teknopiste | Publisher | |
| Teku Studios | Developer | |
| Tekugare | Developer | |
| Tekunon Kougyou | Publisher | |
| Tekuzo | Developer | |
| Telarium | DeveloperPublisher | |
| Telarium Corp. | DeveloperPublisher | |
| Teldon_darv | Developer | |
| Tele Tronic | Publisher | |
| Telecomsoft | Publisher | |
| Telegames | DeveloperPublisher | |
| Telegames EU | Publisher | |
| Telegames Inc. | DeveloperPublisher | |
| Telegames, Inc. | DeveloperPublisher | |
| Telenet | Developer | |
| Telenet Japan | DeveloperPublisher | |
| Telenet Japan (JP) | Publisher | |
| Telenet JapanJP | Publisher | |
| Telent Japan | Publisher | |
| Televisa | DeveloperPublisher | |
| Televisa Home Entertainment | Publisher | |
| Teljoor | Developer | |
| TellomnaX | Developer | |
| Telltale Games | DeveloperPublisher | |
| Telltale Publishing | Publisher | |
| Tellurion Mobile Games | Developer | |
| Telstar | DeveloperPublisher | |
| Telstar EU | Publisher | |
| Telstar Electronic Studios | DeveloperPublisher | |
| Telstar Electronic Studios Ltd | DeveloperPublisher | |
| TelstarPAL | Publisher | |
| Tembac | Developer | |
| Temmy | Developer | |
| TempVar Studios | Developer | |
| Tempa | Developer | |
| Temperanza Bros. | Developer | |
| Tempest Software | DeveloperPublisher | |
| TemplarGames | Developer | |
| TempleDSS | Developer | |
| Temporarily Unnamed Collective | Developer | |
| Temporarium | Developer | |
| Temporary_Alias | Developer | |
| Temsei | Developer | |
| Temulgeh | Developer | |
| Ten Men's Games | Developer | |
| TenTenTwentyTwenty | Developer | |
| TenaciousDan | Developer | |
| Tenbirds | DeveloperPublisher | |
| Tencent | DeveloperPublisher | |
| Tencent Inc. | Publisher | |
| Tender Claws | Publisher | |
| Tendershoot | Developer | |
| TendoMendo | Developer | |
| Tendogames | Developer | |
| Tenfor | Developer | |
| Tengen | DeveloperPublisher | |
| Tengen INT | Publisher | |
| Tengen Inc. | Developer | |
| Tengen NA | Publisher | |
| TengenNA | Publisher | |
| TengenNA/JP | Publisher | |
| TengenNA/PAL | Publisher | |