Factor 5, Inc. was established in the United States in May 1996 with legal support from LucasArts, and in late 1996 the core of the development team in Germany was relocated to the North American company headquarters in San Rafael, California. Julian Eggebrecht, one of the five initial co-founders, served as President of Factor 5's U.S. branch.

The U.S. company closed in May 2009, following the closure