Fisrt you must make sure you have Xbox Live Gold. Then go to matchmaking, and in any playlist, reach the rank of Private (don't worry, it isn't hard). Then go to settings (press start) and go to appearance, and you should have the ODST Helmet! Congrats! Also, you'll know when you get to private when you get a achievement and get a note.
how to get eod in halo3? first:beat the whole campain in ledgendary. that about it.
you have to be a bungie member.
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
you have to have odst and it comes with an halo 3 mythic multiplayer disk and you get it with that
16.
You can get a normal lego figure paint it white then make halo armor and add a lego alien police helmet (blue one with adu on it) and then paint that white and paint a halo helmet
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
i think so lol :)