Spartan Armours:
Mark IV- Default.
CQB- Default.
Rouge- Get the spartan officer achievement (online only).
EVA- Complete the campaign on normal or higher.
EOD- Complete the campaign on legendary (head) or complete ark only for (shoulders) and Tvaso highway for (body)
Haybusa- Find all hidden skulls on the Halo 3 campaign (13 in total)(Doesnt include Mythic skulls).
Mark V- Unlock UNC Spartan Achievement (Online only).
ODST- Unlock the Sartan Graduate Achievement (Online only).
Security- Achieve 1000 gamerscore for Halo 3.
Recon- Get all 7 vidmaster achievements 4 on halo 3 and 3 on halo 3 odst.
Flaming haybusa- Bungie employees only.
Scout- Get the used car salesman achievement (head) and the too close to the achievement (body) and last the Mongoose Mowdown achievement (shoulders)
Elite:
Assault- Default
Combat- Default
Commando- get the overkill achievement (head) and get the Triple kill achievement(body and shoulders)
Ascentic- Get the up close and personal (body) and also steppin razor (head) and also get the overkill achievement (shoulders)
Flight- Complete tavaso highway on the campaign on legendary or heroic (body)complete the ark on legendary (shoulders)complete the campaign on heroic or legendary (head)
You have to get 1,000 gamerscore on Halo 3.
you cant you need to do campain ,or get atevments.
You get the rank of 'Private' On Global ranks.
~Shadow-Siren-Vivian and to get characters for firefight do all the missions on normal ex- cluding Mombasa's streets
You unlock the odst armor by unlocking the UNSC SPARTAN achievement
you get all the vidmaster achievements on halo 3 and halo 3 odst
ODST and Mark V armor are the ones.
White
There is no Halo 4, and will be none, however... I think you are referring to Halo 3: ODST. If that is the case, then you can acquire recon armor by completing all of the Vidmaster Challenges in both Halo 3, and Halo 3:ODST.
you can customize your character in halo 3. and you can change your character that has different armor in halo 3:odst
you have to complete halo 3 odst on legendary, have xbox live and complete halo 3 on legendary
The only way to get armor on ODST is to unlock it on campaign . Except recon wich you need Halo 3. By Mr. Happy Guy.
The Vidmaster Challenge is an Achievement that you have to unlock so you can get Recon Armor when Halo 3: ODST comes out.
All in halo 3 and all in Halo 3 ODST.
To get the recon armor you have to complete all the vidmaster achievements in halo3 and halo3 odst.
What do you mean - Halo 3 or ODST? If it's Halo 3 then: What armour are you talking about? The shield? Or HEAVY ARMOR VEHICLES? If it were the shield then yes. You stay in a safe spot and wait for several seconds. If it were the vehicles, then bad luck (if it blew up). ODST: Get a health pack.