Yes but know one has found any yet.
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.
Yes, in Halo Wars you will be able to play as the Covenant. I dont know, however, if you will be able to play a story mode as the Covenant, but I know that you will be able to in Free Play and Xbox Live.
From what I know, there is no Halo Wars on the PC.
You should get halo 3 odst for xbox 360 but for regular xbox, i dont know.
There are no cheat codes for Halo, only mods.
No you can't get avatar awards in Halo Wars. The only halo game that I know of that you can get avatar awards in is Halo Reach. You might be able to get avatar awards in Halo Anniversary but I don't own it so I don't know.
As far as I know, you can play all original XBOX games on the XBOX 360. It may be different for some of the first XBOX games but both Halo and Halo 2 are playable on the XBOX 360.
Halo 2 was made for the original xbox, unless there was a console before the "xbox" that I didn't know of. It looks cool on the 360 though and Halo 3 looks even beter.
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?".
You google it! Lets say you want to know the cheat codes for Halo 3 on xbox 360. You go to google and type in Halo 3 cheat codes for xbox 360. it will come up with a million results but if i were you, id go with the first page or two of results. Good Luck and have fun!
There are no cheats. The cheats only work on the WII, not the Xbox, I know because I have the game.
ill give you a hint because i don't exactly know but check games radar and search cheats then click xbox 360 then click h you should find halo 3 click on the words and scroll down