Bent on humankind's extermination, a powerful fellowship of alien races known as the Covenant is wiping out the Earth's fledgling interstellar empire. You and the other surviving defenders of a devastated colony-world make a desperate attempt to lure the alien fleet away from Earth. Shot down and marooned on the ancient ring-world, Halo, you begin a guerilla-war against the Covenant. Fight for humanity against an alien onslaught as you race to uncover the mysteries of Halo.
Halo takes you deep into the future, with the fate of planet Earth hanging on your shooting skills. After a massive battle, only one ship is left and its crew is stranded on an abandoned space station. You must do whatever it takes to keep the Covenant from reaching Earth.

Experience the ultimate Halo challenge with all-new online multiplayer for up to 16 players. Take on the world in any of the 15 multiplayer maps including 6 brand new maps never before seen. Unleash destruction with incredible weapons and vehicles including brand new armaments for intense online multiplayer games. Voted Game Of The Year by IGN.com, Electonic Gaming Monthly, and Xbox Magazine.