There are no cheat codes for Halo, only mods.
Try www.cheatplanet.com and try there. There aren't any cheats in Halo 3 (not that i know of), but there are some really good glitches that you may like.
halo 3 does not have any cheats
no cheats in any halo game
Well... yes. I would think so. I think the the way you would like to say that is "Do you know where I can find Halo 2 cheats?".
Yes but know one has found any yet.
yes there is there are many cheats in halo
No
no
None of the Halo's have any 'real' cheats, the only one is the lower your weapon one, which is just like Halo 3's.
yes
no
No cheats