Seropian helped found Bungie in 1991, and headed work on such high profile games as Halo: Combat Evolved, Myth, and Marathon. He left the company in 2004 to found his own studio Wideload Games, which was best known for the offbeat Stubbs the Zombie. Wideload followed that game up with the critically derided Hail to the Chimp in 2008.
Disney Interactive acquired Wideload in 2009, and Seropian was promoted to senior vice president and general manager of core games at Disney Interactive.
Seropian departed Disney after a year in which Disney reported revenues were down for the financial period ending 31st December 2011 by 20%.
The developer has not announced where his next employment would be, or what he has planned for the future.