No you cannot buy halo 3 helmets in the game... but you can buy nerdy plastic helmets at like Gamestop...
you have to unlock achievements
you must have several achievements from HALO 3 and HALO ODST. Along with certain achievements from HALO REACH. Then you will unlock the two helmets
You have to get certain achievements that unlock certain armor permutations.
Technically speaking, all the helmets in the armory are Spartan helmets. If you mean the specific helmet worn by Master Cheif in Halo 3, the MJOLNIR MK. VI, then that costs 300,000 credits.
its easy download it at filefront.com copy this where halo trial halo 1 halo 2 halo 3 mod mods ok?
There is no single "easy way" to get a Perfection medal in Halo 3, but be sure to remain calm and be patient. You will get one in time.
No. If you want to bye helmets go to the armory.
Easy again! Halo Wars, Then shortly after that Halo 3: Odst came out. Now highly waited game of all time, Halo Reach.
To Get the E.O.D Helmet You Just Have To Beat Every Level on Legendary or To Get HayaBusa get all the skulls.
Yes I believe Halo 1 is harder than Halo 3 on easy. In Halo 1 you take significantly more damage in Halo 1 from each shot.
get x box live and play for 3 months within that time youll get it check your helmets when you rank up