Ok this section does say campaign(even though its mostly glitches) so i propose a campaign challenge. in the level crows nest you start with no weapons. The challenge is how far can you get in the campaign with out picking up a weapon.
Having one person with a weapon and another person without is ok, but atleast one person in two people co-op has to have no weapons.
How far can you get?
I got to all the way to floodgate: http://www.bungie.net/stats/halo3/scree ... d=33764095