Ensemble Studios is a video game developer initially established in 1995 as an independent company by Tony Goodman, Rick Goodman, Bruce Shelley, Brian Sullivan and John Boog-Scott, and was acquired by Microsoft in 2001 and operated as an internal studio until 2009, when its development capabilities was officially disbanded, now it operates as support. Ensemble developed many real-time strategy games, including the Age of Empires game series, Age of Mythology, and Halo Wars. In addition to game development, Ensemble Studios also made the Genie Game Engine used in Age of Empires, Age of Empires II: The Age of Kings, and Star Wars: Galactic Battlegrounds. The studio sold 20 million games and was worth an estimated $500 million.