Stop the Covenant
Microsoft's first day at E3 just wouldn't have been the same without more information being revealed on Halo 3. We've been bombarded with information about the multiplayer, but this time around Bungie are letting us know a bit more about the single player campaign, including some brand new screenshots.
After stowing away on a Forerunner spacecraft, Master Chief, a genetically altered, cybernetically enhanced Spartan supersoldier, must race back to Earth to stop the Covenant once and for all and save mankind. With his artificial intelligence companion Cortana in the grip of the Flood’s intelligent embodiment, Gravemind, Master Chief and his allies are vastly outnumbered, but the stakes are too high to do anything but face them head-on.
The war has come to a climax; the Flood continues to grow in numbers and strength, the armies of Earth are scattered and decimated, and the Covenant threatens to activate the Halo, effectively destroying all life in the galaxy. Master Chief's mission is to stop the Covenant, destroy the impending Flood threat and, ultimately, save mankind.
More screenshots overleaf