To earn the Overkill Achievement in Halo 3, you must win the Overkill medal (kill four players within four seconds of each other) in a ranked free-for-all matchmaking playlist such as Lone Wolves.
head-unlock overkill achievement shoulders-unloked by default with the new update body-unlock triplekill achievement
an overkill is 4 kills
get the overkill achievement
Gain an overkill in free-for-all playlist
you need to get 1000+ achievement points from halo 3
in the achievement were in for some chop on halo 3 you do not get scout shoulders, sorry
get a life loser
check xbox360cheats.com ,then click h then look for halo 3 then click achievement then look through them to see if it is or not.
Ascetic Head - You must unlock the 'Steppin' Razor' http://wiki.answers.com/_whitney05/hub/Halo_Cheats.Ascetic Shoulders - You must unlock the 'Overkill' achievement.Ascetic Body - You must unlock the 'Up Close and Personal' achievement.
no you don't you can get the achievement on campaign
THey get you an achievement, and they get you the Hayabusa helmet.