- Call of Duty: United Offensive is an expansion pack for the original Call of Duty (2003), developed by Gray Matter Interactive and published by Activision.
- In September of 2004, Gray Matter Interactive and Activision created an expansion pack called Call of Duty: United Offensive...
- Some of the Gray Matter team still resides at Treyarch, although its founder and several executives from the former studio have found employment elsewhere.
- List of all abandonware games originally developed by Gray Matter Interactive Studios, Inc. between 1965 and 2020. ... An expansion pack for Call of Duty.
- Gray Matter Interactive Studios, Inc. is a computer game developer which was acquired by Activision in January of 2002.
- Gray Matter Interactive was founded as Xatrix Entertainment in 1993 by Drew Markham and Barry Dempsey.[citation needed]...
- Bugüne dek Infinity Ward, Treyarch, Sledgehammer Games, Raven Software, Gray Matter Interactive, Pi Studios, Spark Unlimited, Amaze Entertainment, Rebellion...
- Call Of Duty Serileri Call of Duty serisi, piyasaya Microsoft Windows platformu üzerinde girmiş ve zamanla konsollara kadar uzanmıştır.