Halo: Combat Evolved is a first person shooter developed by Bungie Studios and published by Microsoft Games. Released on November 15, 2001, it was a launch title for the Xbox and helped push the console ahead in the console war. It was ported to the PC and Mac in 2003 and has spawned several sequels. The player assumes the role of Master Chief, the rank of a cybernetically enhanced warrior who is fighting to save Earth from an alien race called "The Covenant." Deserted on a mysterious "Halo" ring world, he is left to discover its deadly secrets.