skull armor? no such thing lol, and i have unlocked everything lol, and i dont know if your meaning the Hayabusa armor or not, but to get that armor you need to collect all of the skulls. edit: Sarah-cloud once again i have to answer this, you get it from a bungie member, if he likes you enough, hel get his buddys to give it to you, like the recon armor,
yes it does No, it dosen you just have to get all 13 skulls that one dosent count.
http://hubpages.com/hub/Halo-3-Armor
No, there is no armor in Halo 3 that has a knife in the shoulder.
go to youtube and type in halo 3 skull hunting and there will be some videos telling you how
There is no Brute armor in Halo 3, only Elite and Spartan models.
go to http://hubpages.com/hub/Halo-3-Armor
No
The first skull on halo 3 is a silver skull. Silver skulls do not award any achievements.
you get all the vidmaster achievements on halo 3 and halo 3 odst
NO
After finding a halo 3 skull, simply pick it up as you would any other weapon.
The tilt skull makes weaknesses weaker and strengths stronger. For instance, with tilt on, it will take 8 headshots with a sniper rifle to kill a brute minor on Normal, while it will take 2 plasma rifle bolts to strip the power armor. Tilt also causes unshielded opponents to have a huge resistance to plasma. For instance, an brute minor with stripped power armor can take a full plasma rifle without dying.