Co-Op Mode Glitch cheats for Halo 3

Co-Op Mode Glitch

Me and my friend found a cool glitch. Note: This only works in co-op mode. In the level Halo after you kill the Oracle go to the next building as usual, then, after killing all the flood, go to the door where you entered and you should be able to see whatever your friend sees on his screen. And I think if you throw a grenade in the door it will freeze in the air and disappear. But when you leave the door it will close.

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