You have to become a UNSC Spartan Rank online.
in one ranked playist get 25 xp
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 have to get 1,000 gamer score on Halo 3.
In halo 3 you must get 950 Gamerscore.
the recon helmet for halo 3 is unlocked by completing all of the vidmaster challenges in halo 3 and halo odst
To Get the E.O.D Helmet You Just Have To Beat Every Level on Legendary or To Get HayaBusa get all the skulls.
you have to have odst and it comes with an halo 3 mythic multiplayer disk and you get it with that
16.
No all 1000 need to be on halo 3
rank up to brigadier and buy it for 300,000 credits.
yes its a glith!
Beat the game on legendary