Guitar Hero World Tour (initially referred to as Guitar Hero IV or Guitar Hero IV: World Tour) is a music rhythm game developed by Neversoft, published by Activision and distributed by RedOctane. It is the fourth main entry in the Guitar Hero series. The game was launched in North America in October 2008 for the PlayStation 2, PlayStation 3, Wii, and Xbox 360 consoles, and a month later for Europe and Australia. A version of World Tour for Microsoft Windows and Apple Macintosh was later released.