You are the last of your kind. Bred for combat, built for war. You willfight on foot, in vehicles, in the air and beneath the surface of amysterious alien ring orbiting in the depths of space. Recognized as one of the greatest achievements in video gameentertainment. The Macintosh version adds16-person online multiplayer, new vehicles, new weapons, new maps,customizable multiplayer games, the precision of playing with a mouseand keyboard and more. Halo owners who have not upgraded to an Intel-based Mac do not need to upgrade their version of Halo. They will still be able to play network games against owners of the Universal version.