Apparently so, yes. Not got to Gravemind yet, but I suppose you could always do the cheat which got you past levels when you didn't own the game, rename the level files etc.
Oh, yea I remember reading something about that. But I've never tried it because I don't own the game.
Damn, all you guys get Halo 2, and the guy at EB Games said it wouldnt run on xp.... They know NOTHING!!!!
It depends on when you asked. If you talked to them when it first came out then I don't think there was a patch then (I could be wrong). But if it was recently they might just not have known that there was a patch available.
it can't legitimately be run on XP, you have to download a less than official patch from GCW or somewhere in order to do it, but it's possible. You can't just buy the game, put the disc in and it run.