Note: All skulls listed here have been found by me on the diffulculty listed. Their effects have been tested and found out by me. Their multiplayer effects have been tested and found out by me. They could occur on other diffulculties but probably not.
No Name Skull:
Level: Armory
Diffulculty: Legendary
Effect: Unknown
Works in Multiplayer: Unknown
How to get: When that captin asks gets on the elevator, wait untill he says "Would it help if I said please?". Then get on. Get on the train and go over and look at the window that looks at the Earth (The one on the opposite side of the door you got on). Hold X for the ride. After you pass the boxes, you will pick up the skull. Unfortionatly you lose it as soon as you get off the train.
Blackeye Skull:
Level: The Great Journey
Diffulculty: Legendary
Effect: Stops your shields form regeneration. You get one full shield bar back every time you melee something to death (friend or foe). You can get all the way to an overshield this way (note that the overshield does not lose power over time).
Works in Multiplayer: No.
How to get: When the scarab knocks down the door, fly over tward it and land the banshie on top of where the door is (Note: You can get the skull before the scarab gets the door knocked down but then it is easier to die because you can't regenerate your shield)(Also note: set the banshie on the ridge so that you are almost level with the spherical surface and are as close to it as possible). You should get out of your banshie and then hop onto the shperical building. Then walk into the rocks and climb up the poll that is almost exactly opposite to the one your banshie is on (Note: It has a light at the top of it). Walk to the top and grap the skull.
Grunt Birthday Skull
Level: The Arbiter
Diffulculty: Legendary
Effect: If you shoot an unshielded enemy in the head, it explodes like a plasma granade. Very useful against flood.
Works in Multiplayer: No.
How to get: The first time that you get your banshie, fly straight down. When you reach the last of the ship thingy, fly to the middle one (I think... it could be a different one) of the three sircular objects. Look around an you should see some patches of blue light under a ledge (if you can not see any blue light, then you are in the wrong place). Fly tward the blue light and you will see that tere is a few grunts dancing around the skull.
Blind Skull
Level: Outskirts
Diffulculty: Any
Effect: Dissables your hud and makes your gun invisable.
Works in Multiplayer: Unknown
How to get: I don't remember...Sorry...
Glitches/Fun Stuff that you might not have known
Sword Cancel
Well...if you haven't found this one out on your own, here it is. A sword cancel is simply a sword lunge *trigger button or B button it does not matter* minus the hurting of the other person. Simply attack and then hit X before you hit the opponant. You will bring up your arm and not hurt them *Note: It is possible to hurt people while sword canceling either by having both people lunge at eachother or by not hitting X fast enough*.
Butterfly
This is mainly based on the Sword Cancel. Simply have some one stand on your head.You will need a sword, rocket launcher or brute shot *others may work, but these have a pretty good melee range*. Then simply melee them while they jump. You will push them up and fly up with them. Use to get to the top of high things.
Croutch Jump
Again, this is just in case you haven't found out about this yet. When you jump, simply croutch im the air to make it farther, land long jumps easier.
Granade Jump
Before you jump, through a granade *perferably a human granade* and then jump just before it goes off. You can get high with this jump.
Granade Croutch Jump
Simply combine the granade jump and the croutch jump to get even higher
Rocket Launcher Jump
A lot like the Granade jump except you use the rocket launcher instead *NOTE: Use only when you have an overshield*.
Specter/Warthog launch
Have a person sit in the passanger seat with a sword. Then walk up to them *make sure they are your enemy* so that they may slash at you. *it sill make the sound like when you slash a dead body with the sword*. Then run to the other map. When there, have the other person get out of the vehical. They will launch out where their curser is aiming. Very useful at getting to the top of levels and on to high places.
Wraith launch
*Note: You need an overshield and perferably damage resistance* Have a person stand next to a wall. *better if sloped a little* Then have another person ram them with the bost of the wraith. They will soar away.
Rocket/sword swich launch
*Note: only works before you update halo on xbox live* While aiming a rocket launcher at an enemy, *aimer is red* swich to the sword. Right before the aimer changes to the sword aimer, fire. If done correctly, you will launch at the enemy.
Banshie on top of Headlong
Take a banshie over to the cricle statue. Above the road on your left, there will be a sloped roof. You can get up either 1. hit the perfect spot and the banshie will simply land on the flat area *Hard* or 2. bost to the top while on the slope. then once it starts pushing you back, stop boosting and fire. *the fireing makes you for some reason go a little higher*. Then once you get highenough, hook one of the wings over the edge and "pull" your self up. *Note: if you try any tricks, your banshie will get damaged and can kill you, also note that you can only go so far in the banshie but can walk to the edge of the buildings*
Reflection on Headlong
After taking the banshie to the top, move it to the right wall and get out. Then climb on the banshie and get on top of the wall. Walk over to where the tower is. Walk twards the right as looking from where you got up. After you come to a corner of the little tower, go right untill you reach the edge and then take another right. If you did it corectly, you will see a black window *? i think it is a window* if you look at it, you will see the reflection of a city that isn't behind you.
Sniper's Rock
In Cogulation, go to the blue base and get the banshie. Fly up to the right untill you see a little ledge with a rock infront of it. Land on it and it is a pretty good sniping spot as you can see a lot of the map. You can also get up ther with the ghost or specter.
Foundation
To get the multiplayer map Foundation, get to the last level of the game in any diffulculty and when in the banshie, do all the tricks. Then go finish the game. You will get the map.
Top of Foundation
To get to the top, first you must have the map :). Then 1. you can specter/warthog launch up ther and then have people sword launch up to you. Or, 2. you can sword launch off people to get on the little ledges on the side to get up.
Top and bottom of Gemani
To get to the top, go outside and then go the the teleporter. Get on top by either 1. launch off some one and hope to land on there, or 2. go to the right of it and look at the little sticks that are poking out. jump on them and go to the very edge then croutch jump on to the ledge behind the teleporter. Once you have two people up there, have one climb to the highest point and then sword launch off them to get on the gray area. Then all the others sword launch up to him. Go to the wall. Have some one start jumping and then have another person sword cancel to make it over the wall. You will fall through the otherside because there is no roof. Walk back to where you jumped from, *the wall is a one way see through thing so you can see out but they cant see in* go to the edge and start jumping and have the other person launch in. Walk in the opposite direction of the way you came in for a minute or so. You will go through some walls that dont have any barriers in them so you can just walk thorugh. After the last one, you will see a large blue crack. walk tward it. You will eventually hit an invisable barrier. if you look down, you will see a little brown ledge. You can either walk left or right for a little *I have always done it on the right* and you will fall through the ground. When you land, you will be at the very bottom of the map. If anyone falls off the map and dies, you will see their dead bodies falling and then land. Unfortationally, there is a large invisable box surrounding you so you can not go just keep walking. *NOTE: 1. while trying to get over the wall, it is possible to fall through a little crack and get killed by the guardians. 2. if you do not walk straight, you can fall through invisable holes and fall to your death. 3. once at the bottom there is no known way to get back up.*
Gagoile on Backwash
Go to the blue base side, you will see a bent tree thing along the bridge like thing. Climb up it and then jump on the bridge *you must land on the little things that come out near the center part* then go to the center and jump to the other side and look at the center. There he will be. He is also visable from the ground but not as well.
Bottom of Waterworks
Go to the center of the level. Go to the side of the large hole and look down. If you see a beam, jump on it. If you make it, you will not die while on the beam. If you jump off, you will still die.
Bottom of Ascension
Go to the large tower. If you go to the overshield bridge, you will be able to see a little beam under the tower. Find a way onto the beam and simply walk down. *None of my ways work all the time*. Make sure you do not jump off or you will die.
Super jump on Zanzibar
Go to the Base. On the second level, go to the side as looking at it from the wheel. Punch out the window closer to the wheel. Croutch down and face the wheel. Move forward so that you hit the frame of the window, you will still be stuck because of a little peice of glass. Keep holding forward untill your screen twiches. Then jump but keep holding forward. You will be launched on top of the base. *When I say the wheel, i mean the large wheel where the sword spawns*.
Out of Zanzibar on the base side
Use the super jump to get two people ontop of the base. Then walk to the right side if you were looking from the wheel. Get on the rock and have one person go to the invisible barrier and one person go to where the rock and base meet so that they are almost falling off. Have the first person start to jump and the second person sword launch off of them. If done correctly, the second person will launch over the invisible barrier. Then do the same for the first person and explore.