I'm sorry bud but there isn't a cheat code to unlock all the armour in Halo. PERIOD.
no just work for the armor
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.
No, in Halo 2 you can not unlock armor.
No.
go to http://hubpages.com/hub/Halo-3-Armor
No. Bungie's gives you the armor as an award. You can't cheat the armor, unless you can cheat them.
To unlock Recon armor in Halo 3, you originally had to beat all of the VidMaster achievments, but the armor is now available to all players. To unlock the recon armor in Halo: Reach you had to pre-order the game and you would get a long (25 character) code for the recon armor DLC. To unlock the recon armor in Halo 4, you had to either pre-order the game or simply buy the armor with your in-game credits.
you buy it and you can unlock some by halo waypoint (free download)
Get some skulls dummy
There is two ways to get it #1 unlock all of the armor #2 is to become the highest rank in halo reach
nope but you can hack or if you have a friend who works at Bungie he could give it to you. Also, you can now get Recon armor by completing all of the Vidmaster challenges in Halo 3 and Halo 3: ODST and then going to Bungie.net to unlock it.