Firaxis Games is an American video game developer founded in 1996 by Sid Meier, Jeff Briggs, and Brian Reynolds upon leaving MicroProse. Now a wholly owned subsidiary of Take-Two Interactive, the company is best known for its Civilization series of games, though it has had notable success with other titles as well. Firaxis is based in Sparks, Maryland; Sid Meier continues to lead creative efforts there.Jeff Briggs assumed the role of Chairman in April 2006 and left the company completely in November. In April 2007, Soren Johnson left the company and joined Electronic Arts to work on Spore with Lead Designer Will Wright. Johnson was formerly a key person for Firaxis, acting as co-designer for Civilization III and later Lead Designer on Civilization IV.