Forza (Italian for "Force" /ˈfɔərtzɑː/) is a popular and critically acclaimed series of racing video games for Xbox consoles and Microsoft Windows published by Microsoft Studios. The franchise is currently divided into two series, the original Forza Motorsport series developed by Turn 10 Studios and the open world-focused Forza Horizon series mainly developed by Playground Games. As of February 2010, the Forza games have sold over 10 million copies since the release of Forza Motorsport in May 2005.