Towards the end of development for Call of Duty 2: Big Red One in 2005, Gray Matter was merged into Treyarch, and the team responsible for titles like Return to Castle Wolfenstein is no longer recognized by that name. Some of the Gray Matter team still resides at Treyarch, although its founder and several executives from the former studio have found employment elsewhere.

Games developed as Gray Matter

• Call of Duty 2: Big Red One (in conjunction with Treyarch)
• Call of Duty: United Offensive (expansion)
• Return to Castle Wolfenstein (multiplayer was done by Nerve Software)
• Tony Hawk's Pro Skater 2 (PC)
• Trinity: The Shatter Effect (canceled by Activision)

Games developed as Xatrix Entertainment

• Kingpin: Life of Crime
• Quake II: The Reckoning (expansion)
• Redneck Deer Huntin'
• Redneck Rampage Rides Again
• Redneck Rampage
• Cyberia² «Resurrection»
• Cyberia

External links

• Gray Matter website
• Activision
• Article mentioning Trinity cancellation
• Screenshots & summary of Trinity premise