This was taken from another web.
Hope it will aid u in Halo 3 armor searching.

The skull is located on then Covenant level at the very end. I would love to be specific but i dont want to spoil anything for the few people who haven’t played through campaign yet. Then you jump through rings in this order:
4 5 6 5 7 6 5 4 1 2 3 2 7 2 1 1 3 4 6 7 5 4 6 5 4 5 3 4
Each ring is a note which plays out the Halo song. After you do that you head back to the energy bridge and there the skull will be waiting for you.
The sucky thing is, last night I did some hard thinking at pretty much figured out the sequence was going to be the halo song, just couldn’t figure out which ring was which note… I also spent 2 hours looking through the map and really didn’t want to play another 30 minutes of the same stage to try out a theory. I come back from work to find out i was pretty much right. UUGGHH! Oh well. I’m not sure who originally found it, but major props man!
Anyways, go out there and get it!

Most people are asking the same questions “How do you unlock the armors in multiplayer?” Luckily, I found a list of how to unlock them from the Gamefaqs message boards. Also a picture to go with it. One problem though, the list doesn’t mention anything about how to unlock the Hayabusa (Samurai) armor. I’ve seen it in the game last week and didn’t pay much attention to it, but now it seems to be a mystery to everyone. So, if anyone out there knows to get the Ninja Gaiden armor, enlighten us. PLEASE!

Body PiecesSpartanEVA……………..Complete Tsavo Highway on Normal, Heroic, or LegendaryEOD……………..Complete Tsavo Highway on LegendaryScout……………Unlock “Too Close to the Sun” Achievement (Destroy an enemy banshee with the Sp’laser or missile pod in a ranked playlist or campaign)EliteFlight……………Complete Tsavo Highway on Heroic or LegendaryAscetic…………Unlock “Up Close and Personal” Achievement (Kill 5 enemies via melee or assassination in a ranked FFA playlist)Commando….Unlock “Triple Kill” Achievement (Get one triple kill)
Shoulder PiecesSpartan EVA……………..Complete The Ark on Normal, Heroic, or LegendaryEOD…………….Complete The Ark on LegendarySecurity……….Earn 750 Gamerscore PointsScout……………Unlock “We’re in for some Chop” Achievement (Destroy an enemy vehicle with a piece of equipment in a ranked playlist or campaign)EliteFlight……………Complete The Ark on Heroic or LegendaryAscetic…………Unlock “Overkill” Achievement (Get one overkill)Commando….Unlock “Killing Frenzy” Achievement (Get one killing frenzy)
Head PiecesSpartanEVA……………..Complete Campaign on Normal, Heroic, or LegendaryEOD……………..Complete Campaign on LegendarySecurity………..Earn 1,000 Gamerscore PointsScout…………….Unlock “Used Car Salesman” Achievement (Destroy an enemy vehicle containing 3 enemies in Campaign or ranked playlists)Mark V………….Unlock “UNSC Spartan” Achievement (Reach Sergeant ranking online)ODST……………Unlock “Spartan Graduate” Achievement (Earn 5 EXP or complete 10 ranked matches)Rogue………….Unlock “Spartan Officer” Achievement (Advance to the Spartan Officer ranks online)EliteFlight……………Complete Campaign on Heroic or LegendaryAscetic………….Unlock “Steppin’ Razor” Achievement (Get one triple kill with an energy sword in ranked FFA)Commando….Unlock “Overkill” Achievement (Get one overkill)
EDIT: Well its been confirmed. The hayabusa Armor is unlocked from the skulls. I believe its from the amount of skulls you find, not by which one. I currently have 12/13 skulls and the last skull name I Would Have Been Your Daddy is apparently the toughest to find. Bungie even mentions that “IWHBYD is hidden in ways you cannot yet even imagine. It’ll be a while, unless someone at Bungie leaks it. Good hunting, gentlemen.”
A week ago when i was playing a few custom matches and ran into a fellow name Ske7ch. (don’t bother sending requests or messages. I don’t think he replies) He had on the Hayabusa armor and i didn’t think much of it because I didn’t understand how rare it was. Now it seems that he is one of VERY FEW people who have the last skull. you can check out my File Share to see a picture of him.
*I also edited the picture because the Rogue/EOD armor had the wrong chest piece on it. Also renamed it to EOD to match the list of armors.*
EDIT (2): What started out as a mystery has now changed into a worldwide hunt for the illusive IWBYD skull. Rumors say it is on Covenant and an image of the game’s hex shows that Skull_Daddy is on stage convenant. So go out there and look for it!
- Jerome “the360loop” Francisco -