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On the level Sierra 117 there are two skulls. To get the Blind skull(first skull), after you kill the first Brute and Grunts, a phantom will come down in front of a little water fall. Kill all the grunts and one brute that come out, then face the water fall and go left. You will see one or two trees, bushes, and rocks. Jump over them and you should see the skull sitting there, press RB to pick up.
To get the iron skull(second skull), get to the part of the level where you have to save Johnson. Kill all of the enemy. Once you do that don't save Johnson just yet.Go to the bridge you crossed to get to Johnson and jump on the wall to your right. Then walk forward and jump on the wall in front of you. Then go the only way you can go , left. Keep going and take another left, then a right, take the last few steps and the skull is on the ground to your right.

There is another skull at the beginning of the floodgate lvl..
Once you come to a small barricade.. In a second or two a flood will be seen on top of the building on the right side.. I recomend shooting him twice if possible while on the roof.. You must kill him while he is jumping over the walk way.. If you kill him at the right time he will drop the skull...

The first skull is on the sierra 117. As you kill off all the enemies after the phantom drops tyhem off there should be a small group of grunts as you face the open part of the map. Go over there and there will be a rock platform and there will be the first skull. I dunno which one it is. The second skull is later in the game when you go to save johnson. After killing off the enemy don't go to save johnson but go to where the windows are above him and where there was a sniper jackal(snipers usually on heroic and legendary)is. Go all the way to the end of that path and at the end is a little covie where the skull is.In the nxt lvl(crows nest) right in the beginning you have no weapon. So you go as if you going downstairs but go to an empty gun rack where there are pipes behind it. It's on the top level where you start so don't go downstairs. If you jump on the rack then the pipes jump to the large pipe and the skull is at the end of the large pipe directly above where you start the mission.The second skull on this lvl is a little trickier to find. As you are about to go down a pipe after killing off a group of brutes some drones should come up and attack you. At least they do to me but I think they hate me!! Anyway...jump down that pipe and there will be various pipes where more drones come out on you right and left. As you get to the end of thet tunnel looking down into another pit you want to drop don't jump drop down and quickly pull back because theres a tunnel underneath you where another skull is hidden.Then it's to Tsavo Highway. As you ride on a warthog on a large bridge there will be another very big pipe on you left as you come out of a tunnel. You wanna go onto that pipe and as your walking on it if theres a regenerater b4 a fence wall your heading the right way. This is part way through the mission I might add I'm thinking just before halfway or sooner. So as your on this pipe jump the fence and look down there should be a platform with bolts and stuff on it. You may think youll die but youll live. As you land look over to a ground platform and jump to it. While on this one there is another farther up on your left you need to jump to. Be careful because if you fall youll die but right on that other platform is the skull you want.k thats all on tsavo I think I'm doing this by memory... Nxt is the storm level.ok so on the storm lvl you have an objective later in the game to destroy the anti air wraith. DONT DESTROY ANY WRAITHS UNTILL YOU HAVE THE SKULL!!!! Kill off all the ghosts because itll make your life a lot easier. I suggest killing the brutes on the turrets on the wraiths because you may need to get close to them.but if you destroy a wraith the skull dissapears!!! The skull is located on top of the biggest cannister near the anti air wraith. To abserve theres a sniper rifle on top of the little building where theres lots of grunts jackals and a brute along with a br container. Go up those stairs and its(the sniper rifle) along a wall somewhere up top. But I digress...you wanna get on top of that container that has the skull. I do it by stockpiling a bunch of ghosts and a warthog etc and grenade jumping on it. You can just grenade jump on it but to do that you have to be un-noticed by one of the wraiths thats hellbent on kiling you!i think thats all on the storm level...nxt would be the floodgate lvl. Ok so at the star of this yo should have a br. Nw the kid undead something says to shoot it while in mid air but I've been very unluck with that in the past. In my opinion it's easier to shoot it when he is still standing still....but anywho you start with a br. You wanna got to the buildings on you left or directly in front of you just go with the way you came in. You might wanna let him jump first just for refrence... But as you walk between the buildins look up to your right and after you walk far enough a flood dude will appear. He is carrying the skull... Be careful because he jumps. One br to the head will kill him but your timing will have to be good. Thats why I just press start and last save point and practice till I get it.its simple to do just timing and patience with aiming and etc.the next two are on the ark level. The first one is EXTREMELY hard to get in my opinion. Both times I got were really lucky. I think this one is famine. What you wanna do is save some plasma grenades. If you don't know how to grenade jump practice by yourself on a custom game but you time the grenade(throw it and wait) to explode exactly when your press 'A' to jump and it will propel you higher than usual so you can jump farther and higher.1 downfall is if you do it wrong it could kill you or you just do nothing so I suggest you practice it b4 you do it for real. But anyway...you wanna go about the mission normally just when you get to the part where you come over a hill and see a large bridge take a right to another bridge go to the back o you can go up on top of it youll probably meet two or so ghosts...but anyway go to the last tier all the way towards where the other brodge is. Zoom in and see that it's neatly tucked in the back. This is where it gets tricky. Plant a sticky where the little pattern on the floor looks like a box with arms right at the base of the tier. Just keep trying until you get it. The next skull(cowbell) is pretty easy to gget. After you destroy the scarab go to the little buildin in the middle of nowhere and pick up one of the many grav lifts. Keep it and don't use it until the skull.As you go inside the building you will come to a stair case or a ramp. When you get to the second one it should have a clear floor and little rooms stacked on top of eachother the top one contains the skull drop your grav lift(going in the downward direction of the ramp) between the last light on the slant of the ramp and the black line being closer to the line. Still this will be difficult to do.The next two skulls are on the covenant. You will have a part in the game where you get two hornets. You use them to switch bases and shut down the rings or whatever...anywho you have to go to this base infested with grunts brutes and wraiths along with some banshees!!! So if you notice when your flying across to the other base theres one(another base) before that that is desolate. At the top on the inside is a platform type thing with the skull sitting there waiting to be picked up all the way to the end.Now the second one to find was really hard for me to get because none of my friends could remember what sequence they did!!! But at the very end of the mission you kill the prophet and the flood return to their bad selves. :-( but theres debate over whether or not you need to kill them all off but I do because it makes things a lot easier!! But whatever you do don't jump through the rings till your sure you started in the right place. If you hadnt noticed the holographic rings above you represent the actual rings of the halo weapon. When jumped through the emit a verrrrry quiet note. What bungie did was make it extremely hard to get this skull by makinbg you play the halo 3 theme song!!!!!!!anyway after you get done sulking about that the ring when you FIRST is #1 enter the series of platforms. The one closest to the prophet is #7. To make a refrence point the 4th ring is red. So after all the flood is gone you will start jumpig literally through hoops to get the IWHBYD skull. The sequence is as follows 4654534. When this is entered correctly the rings light up and flash. The skull will appear before the bridge to the prophet.The next skull is on the cortana level. After you jump or drop through this odd little hole(hole not door) there will be a base like sorta thing covered with those spidery little guys that morph(for lack of a better term) into other thingys. The platform will be see through and there should be a grav hammer underneath. Now if you look around you will see a wall that has peculiar little ledges on it that look like you can jump onto them. You can and you have to stand on this little rounded light thingy to do it.after getting onto those you can look up and see another ledge above you jump onto that, then you see a ledge going up to the on top of the roof. Thats where the skull is hidden.nwo the last skull is really easy to get. As you start the last mission and precede down a tunnel you will notice another smaller cave like tunnel on your right behind a lare rock. Follow that to the end and there it is. Hope you enjoy the skulls and if theres any questions just ask me. Oh and my gamer tag is Captain caRAZEH

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