Companies
- Tesco
- Testology Ltd
- Testronic
- Tetris Online, Inc.
- ThatGameCompany
- The 3DO Company
- The Astronauts
- The Awesome Game Studio (TAGS)
- The Bartlet Jones Supernatural Detective Agency
- The Behemoth
- The Blast Furnace
- The Brandr Group
- The Chinese Room
- The Coalition
- The Code Monkeys Ltd
- The Collective
- The Creative Assembly
- The Entertainment Consumers Association
- The ESA
- The Escapist
- The Experimentation Group
- The Fullbright Company
- The Game Band
- The Game Factory
- The Games Company