| To One | DeveloperPublisher | |
| ToKoMoTo | Developer | |
| ToSu91 | Developer | |
| ToadBird | Developer | |
| ToadModeGames | Developer | |
| ToadOdyssey | Developer | |
| Toadboyf | Developer | |
| Toadhouse Games | Developer | |
| Toadman Interactive | DeveloperPublisher | |
| Toaplan | DeveloperPublisher | |
| ToaplanJP | Publisher | |
| Toash | Developer | |
| ToastGhost | Developer | |
| Toast_Hatter | Developer | |
| Toasted Gears | Developer | |
| ToastedButter | Developer | |
| Toaster Werewolf | Developer | |
| ToasterFuel | Developer | |
| Toasterkidd | Developer | |
| Toasterpower777 | Developer | |
| Toastery | Developer | |
| Toasty | Developer | |
| Toasty Bread Team | Developer | |
| Tobadi | Developer | |
| TobbTheBobb | Developer | |
| TobbleSwap | Developer | |
| Tobias | Developer | |
| Tobias Bruch | Developer | |
| Tobias Klüpfel | Developer | |
| Tobias Nylin | Developer | |
| Tobias Schnackenberg | Developer | |
| Tobias Springer | Developer | |
| Tobias V. Langhoff | Developer | |
| TobiasM | Developer | |
| Tobin Tojo | Developer | |
| Tobop Productions | Developer | |
| Tobse | Developer | |
| Toby Fox | Developer | |
| TobyMeah | Developer | |
| Tobyfox | DeveloperPublisher | |
| Tobyy | Developer | |
| Tochas Studios | Developer | |
| Toco Games | Developer | |
| Tocseoj | Developer | |
| Todd | Developer | |
| Todd Furmanski | Developer | |
| Todd Makes Games | Developer | |
| Todd Porter | Developer | |
| Todd Replogle | Developer | |
| Toducs | Developer | |
| Toe Beans Studio | Developer | |
| ToeJam & Earl Productions | Developer | |
| Toei | DeveloperPublisher | |
| Toei Animation | Publisher | |
| Toei Animation JP | Publisher | |
| Toei Company | Developer | |
| Toffee | Developer | |
| ToffeeRecord | Developer | |
| Tofu Heavy Industries | Developer | |
| Tofu Sheets Visual | Developer | |
| Tofu Shop | Developer | |
| Toga Party | Developer | |
| Toge Productions | DeveloperPublisher | |
| Toggammy | Developer | |
| Togi | Developer | |
| Togo | Developer | |
| Toho | DeveloperPublisher | |
| Toho (JP) | Publisher | |
| Toho NA/JP | Publisher | |
| Tohoku Shinsha | DeveloperPublisher | |
| Tohu Bohu | Developer | |
| Toka | Developer | |
| TokaJP | Developer | |
| Tokai Communications | Developer | |
| Tokaint | Developer | |
| Tokan | Developer | |
| Tokkimeki | Developer | |
| TokuSoft | Developer | |
| Tokua Shoten | Publisher | |
| Tokuma Shoten | DeveloperPublisher | |
| Tokuma Shoten Intermedia | DeveloperPublisher | |
| Tokuma Shoten Publishing | Publisher | |
| Tokuma Shoten Publishing Co., LtdJP | Publisher | |
| Tokyo Denshi Sekkei | Publisher | |
| Tokyo Electron | DeveloperPublisher | |
| Tokyo RPG Factory | Developer | |
| Tokyo Shoseki | DeveloperPublisher | |
| TollerHovler | Developer | |
| Toly | Developer | |
| Tom | Developer | |
| Tom Ahawk | Developer | |
| Tom Arnold | Developer | |
| Tom Astle | Developer | |
| Tom Becklund | Developer | |
| Tom Ciccone | Developer | |
| Tom Clabon | Developer | |
| Tom Corral | Developer | |
| Tom Create | DeveloperPublisher | |
| Tom Elliott | Developer | |
| Tom Fresen | Developer | |