Unlock what head?
Complete all of Halo 3 on Legendary! U cant if u r the n00b!
head-unlock overkill achievement shoulders-unloked by default with the new update body-unlock triplekill achievement
The Security Head and only be unlocked by getting a gamerscore of at least 1000 in Halo 3 with at least 49 achievements from Halo 3 unlocked. Before Title Update 2 this meant you had to unlock all the achievements to unlock the Security Head. Since the new achievements from Title Update 2, the head may be unlocked from any 49 non-vidmaster achievements.
get all the skulls easily u can you tube it also u can play multiplayer online to unlock items getting halo ODST u can unlock recon by doing the vidmaster challenges in halo odst and halo 3
Unlock it where? It's already in it by default.
You unlock the armor.
you have to complete halo 3 odst on legendary, have xbox live and complete halo 3 on legendary
There isn't a known cheat code for this on Halo 3.
Your work for them.
No
for finishing the halo 3 campaign on heroic you unlock the E.V.A helmet, plus the shoulders and body plate for certain missions.
Unlock Halo 3:ODST's Campaign Complete Achievement. Once you beat the ODST campaign, visit Halo Waypoint on the dashboard to unlock the item.