You have to get 1,000 gamer score on Halo 3.
ill give you a hint because i don't exactly know but check games radar and search cheats then click xbox 360 then click h you should find halo 3 click on the words and scroll down
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
16.
No all 1000 need to be on halo 3
rank up to brigadier and buy it for 300,000 credits.
Beat the game on legendary
yes its a glith!
you have to be a bungie member.
THey get you an achievement, and they get you the Hayabusa helmet.
i think so lol :)