Alternate Ending Movie
Beat The Maw on legendary difficulty to see a new ending movie. The new movie will feature the Sarge and an Elite fighting over an Assault Rifle. Then, both of them will look towards the Pillar Of Autumn as it starts to blow up. The Sarge will then say to the Elite: "this is it baby, hold me". Then they will hug and the game will get back to it's original ending movie with the Chief flying off in the Longsword.