Trion Worlds, Inc., is a publisher and developer of connected video games.

Thatgamecompany is an independent American game developer, co-founded by University of Southern California students Kellee Santiago and Jenova Chen.

Treyarch is an American game developer founded in 1996, and acquired by Activision in 2001. It works on the Call of Duty series games. Before Call of Duty, Treyarch has also worked on 007: Quantum of Solace and several games in the Tony Hawk franchise.