Halo An award-winning, twisted, sci-fi story, filled with complex characters and cunning enemies Fight on foot, in vehicles, in the air, and beneath the surface of an orbiting alien ring Intense 16-player, online PC/Mac battles; new weapons, maps, and vehicles Increased precision of obliterating the Covenant swarms with a mouse and keyboard Play as a single-player or take the battle online with gamers all over the world An award-winning, twisted, sci-fi story, filled with complex characters and cunning enemies Fight on foot, in vehicles, in the air, and beneath the surface of an orbiting alien ring Intense 16-player, online PC/Mac battles; new weapons, maps, and vehicles Increased precision of obliterating the Covenant swarms with a mouse and keyboard Play as a single-player or take the battle online with gamers all over the world