You get the body by beating Tsavo Highway on Legendary, the shoulders by beating The Ark on Legendary, and the helmet by beating the whole game on Legendary. Pretty worth it, since you get EOD armor AND 125 Gamer Points.
Spartan (Mjolnir) Armor Variants
Bungie ArmorThe Bungie Armor/E.O.B. is the cause of the flaming head, which is worn only by bungie.net employees. The flame works with any helmet as it is actually part of the body plate, which looks identical to the E.O.D. with one difference, it produces a flame in the helmet. C.Q.B. ArmorClose Quarters Battle Armor is a type of armor that focus on, well, close quarters battle. It was designed to improve survivability in close combat; specifically by looking at alternate methods of K dispersal and improving joint mobility. E.O.D. ArmorExplosive Ordnance Disposal is the detection, identification, on-site evaluation, rendering safe, recovery, and final disposal of unexploded explosive ordnance. It may also include explosive ordnance which has become hazardous by damage or deterioration. E.V.A. ArmorExtra Vehicular Activity Spartan Varient is a type of armor that focuses on greater vehicle activity. It was designed for increasing exoatmospheric endurance and improving mobility in zero gravity without the use of thrusters. Hayabusa ArmorThe most unique armor that doesn't seem to fit into the Halo universe at first glance. Based on Ryu Hayabusa of the Ninja Gaiden Series and Dead or Alive this suit is almost an exact Copy of the Future Ninja Suit. A nice bonus armor for those who obtain all of the highly sought after Skulls. Katana Armor"The katana is to be used as an extension of ones arm for those intending to be warriors." An unusable attachment to the back of the Hayabusa's body armor. Although it has been debated, and sometimes gamers may get it as a glitch and lose it later, to receive the katana body you must complete 49 Halo 3 achievements and have at least 1000 gamerscore in Halo 3. Mark V ArmorThe Mark V armor, as you most likely already know, is the armor that Spartans, including 117, were equipped with in Halo: Combat Evolved. It's pretty simple, just a model of the Mark V armor. Mark VI ArmorThe default armour for Spartans. The Mark VI has been worn by Master Chief since the beginning of Halo 2, replacing the older Mark V Armor. O.D.S.T. ArmorOrbital Drop Shock Troopers (ODSTs), AKA Helljumpers, (named this because of the extreme temperatures inside the drop-chutes) are an elite special forces group of the UNSCDF Marine Corps, commanded by Naval Special Warfare. They are dropped into their mission areas by an HEV (Human Entry Vehicle) low-orbit drop. This helmet will give a nice twist to appearance, causing you to look like the trusty, uber-marines, that you fight along side with. Disguise yourself in the all-tactical helmet of the O.D.S.T. Recon ArmorAn armor that is a very rare variant. This armor also goes along with the flaming head bungie armor. (see Bungie armor) Firstly, only for Bungie employees, until Bungie decided to realease it to certain individuals who did hilarious things unintentionally withing the Halo 3 sandbox. Such as the Traffic Cone Death or the Self-Snipe Suicide. People can earn this armor by creating an amazing level on forge as well. However, if you are unable to create a good map or something amazing, you can simply start completing the Vidmaster Challenges. If you complete all of them, three of which are in Halo 3: ODST, you will receive the Recon armor. Rogue ArmorThe Rogue Helmet is the Mark VI (a) Variant which you get for being a spartan officer. Called a "rogue" helmet because it is manufactured by rebels. (The ones under Jiles) Security ArmorThe Security Armor is an old variant of the Mark V Armor. It is closely based on the armor of the Marathon series' protagonist - if you look closely you will see a Marathon symbol above the visor. Scout ArmorThe Scout Armour is a variant that was tested along side the Recon Variant the main idea being an armour with Stealth Capabalities with no impact on endurance, but this variant relies more Heavily on Advanced materials.All of this information was copied directly from HaloWiki.net
Get all 7 vidmaster achiements [4 for halo 3 3 for ODST] then connect your gamertag to buingie and presto.
to get the eod you must complete all campain on legendary
all you have to do is complet the game on normal but people say that if you wear the helmet you well get sniped alot!
if you want to know how to unlock all the armor in halo 3 go to http://www.YouTube.com/watch?v=oxP0MfhjakY that is a video of how to unlock all the armor in halo 3.
You have to go to your armoury and buy it with credits you can earn in multiplayer and custom game. You start off with 5000 credits
it's a hack glitch or something,go on youtube and type in ***halo reach all armour and 2 billion credits***,hope this helped.
You need achievements to unlock them.
You unlock the armor.
go to http://hubpages.com/hub/Halo-3-Armor
You unlock the odst armor by unlocking the UNSC SPARTAN achievement
you have to get 49+ acheivments
There isn't a known cheat code for this on Halo 3.
you have to complete halo 3 odst on legendary, have xbox live and complete halo 3 on legendary
You have to complet the game on legendary
Get some skulls dummy
No, only elite's.
yes you still unlock the armor. you and the player that your playing with unlock the armor. =] =) =p q=].
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.
the mark vi or CQB but if you already know that,id start with Eva (complete all campain on normal) or hayabusa (collect 13 skulls in campain to unlock all of it)