Impossible. How did you could do that?
No, in Halo 2 you can not unlock armor.
http://hubpages.com/hub/Halo-3-Armor
go to http://hubpages.com/hub/Halo-3-Armor
No.
All the armor are the same it's just the way how you want to look WRONG! the best armor in halo 3 is the recon armor and you have to be a member of bungie OR get all 7 vidmasters in halo 3 ODST
you get all the vidmaster achievements on halo 3 and halo 3 odst
there is no permanent cheats in halo 3. you need to unlock them by achievments. and, you can not get the flaming armor effect, it is only for bungie employees. in halo reach, buy the legendary package to get that armor effect.
There is no glitch.
By getting skulls.
get all skulls
There is no cheats.
There is two ways to get it #1 unlock all of the armor #2 is to become the highest rank in halo reach