only in color-emblem-or being an elite/spartan
No, in Halo 2 you can not unlock armor.
In halo he wears mark 1 armor in halo 2 he wears mark 2 armor
You can't. It is impossible.
In Halo 2, Master Chief has Mark VI armor which is an upgraded version of the Mark V armor from Halo 1. If you're looking for the reason why his armor had changed between Halo 2 & 3, I think they just upgraded it, but not enough to call it Mark VII armor.
You can't. It is impossible.
There is two ways to get it #1 unlock all of the armor #2 is to become the highest rank in halo reach
YEZ! real halo armor at ebay.com
by picking up an oversheild
You have to download a mod, there is no halo armor in the game itself.
http://hubpages.com/hub/Halo-3-Armor
No, there is no armor in Halo 3 that has a knife in the shoulder.
yes you can well in multiplayer anyway