- Haunted Glory - The Rise and Fall of Trilobyte - Article by Geoff Keighley on the company.
- TARGET33 - Develops arcade games for the PC.
- Tate Interactive - International company based in Poland creating PC and console games. Developer of Kao the Kangaroo, 3D arcade platformer.
- Tibo Software - Developer of action and puzzle PC shareware. Titles include Jigs@w Puzzle, Rolling Marbles, and Bad Toys 3D.
- Time Voyagers - Developer of Piranhas and Jatris.
- Toejam and Earl Productions - Developers of the Toejam and Earl Series.
- Torn Space - Torn Space develops multi-player games for thousands of simultaneous users. Also available are courses and materials to teach others to develop games.
- Torus Games - Developers of Max Steel and Hello Kitty.
- Treyarch - A multi-platform software developer with a focus on action and action-sports games. Contains company and game information.
- TrueVision3D - Developer of 3D game engines. Offers screenshots, downloads, and forums.
- Twilight Software - Developer of the Sydney Mystery and Millennium Adventure.