Drew Markham and his business partner Barry Dempsey founded Xatrix Entertainment in March 1993.

[1] Among its later projects was Quake II Mission Pack: The Reckoning, for which it worked with publisher Activision.

[3] With the assistance of Activision, Gray Matter Studios was established on June 17, 1999, and took over most of the former employees.

[7] Post-acquisition, the studio was put to work on the Call of Duty: United Offensive expansion.

As part of Treyarch, the former Gray Matter Studios team worked on Call of Duty 3.