Halo: Combat Evolved Anniversary

This skull which gives you unlimited ammo can be found on the fourth mission: The Silent Cartographer, after the covenant lock the doors you have to go to the security override building. In the tunnel before activating the console, turn right, go outside then turn right again and you should see the exterior of the tunnel you came through, the skull is on top of this tunnel at the far end. To get to it, you need to grenade jump (throw a grenade, jump and the force of it makes you jump higher) onto the structure and grab the skull.

This skull which when turned on, only melee attacks restore your shields can be found in "The Library" and requires a grenade jump (Throwing a grenade at your feet and the force of it should propel you higher) , It is located right at the start before you enter the big round room where the index is located. There are vents on the wall where flood come out of. With your back facing the entrance to the index chamber, the skull is located in the vent to your right, grenade jump on to the platform in front of it then jump normally into the vent, move towards the end of the vent and you should pick it up.

"Explosions have twice the damage radius. Light fuse, run away." This skull can be found in "Halo" right before the tunnel. When approaching the tunnel by warthog, drive to the right, get out, and walk up the narrow path until you reach the skull.

In "Assault on the Control Room," you can get a banshee shortly after the tank. Take the sniper rifle and the rocket launcher. Clear the enemies, and then go to the boulder on the right side of the tunnel. Look up and you will see a rock bridge. Now, while still looking up, start moving forward until you see a platform coming out of the wall. Zoom in with the sniper rifle to the center of the platform, and then without moving change to the launcher and fire. A banshee will fall off the ledge, and you can use it.

Equip the pistol and go behind a Hunter enemy. You'll see an orange spot on their back; hit the orange spot once and the hunter will die.

At the end of each Terminal video, you are presented with a code comprised of 5 Forerunner symbols. Pause the videos at this point and take pictures of the codes or draw them on a piece of paper. Log in to the Halo Waypoint console app and press "X" at the main menu. You will then be presented with a series of colored circles on-screen. Press the face buttons that correspond to the color pattern from left to right (i.e. Blue-Green-Blue-Red-Yellow-Blue will translate to X A X B Y X). If this is your first time accessing this hidden section of the app, you will immediately be presented with the code entry screen. Enter the codes you copied earlier by highlighting the Forerunner symbols that correspond to the codes you logged and pressing "A". Then confirm the code by highlighting the 3-arrow symbol and pressing "A". For every code you enter successfully, you will 1) unlock the corresponding Terminal video for use in Waypoint, 2) earn 7,000 credits each for the first 9 terminals, from "The Pillar of Autumn" to "Keyes"; unlocking the Terminal video from "The Maw" will net you a whopping 32,000 credits. And 3) upon entering all 10 codes, you will unlock a special 11th Terminal video that can only be viewed in Waypoint. To go back to the Waypoint main menu, select "Reset Terminal" at the Secret Terminal menu. Note that whenever you do a fresh boot of Waypoint, you will still need to press "X" at the main menu and enter the color-code in order to access the Secret Terminal menu if you want to view the videos again. You will find them in the "Alpha Halo Archive" Data Set.

The Eye Patch Skull is located on the level The Library. When you reach the very end of the level there is a door that opens and you would normally walk straight across a bridge and end the level on the elevator which leads to the Index; however, the skull is located beyond this (the opposite side of the level) so you'll have to take a small hike around to get there. Finally after a decade of Halo we can deactivate auto aim!You must have on the new graphics.

The Famine Skull is located on the level Silent Cartographer. At the beginning of the level just turn around and walk around the island until you reach the large rock where the Pelican crash site is later located (where you obtain the rocket launcher and below the entrance to unlock the door). Walk up the rock to the top and claim the skull.

This skull which disables the players radar can be located in "Assault on the control room" and requires a grenade jump (throwing at your feet , jump and the force of it makes you jump higher), after going down the first elevator, there will be a transparent object in the middle of the room with fog going through it and 4 platforms around it. You need to grenade jump onto a specific platform. Its the one that looks different front the other 3, and grenade jump onto it by first climbing onto the ledge behind it then throwing a grenade right at your feet. Once onto the platform you need to jump into the vent on top of the fog platform, the skull is located right inside here.

This skull can be found on the level Truth and Reconciliation in the large hanger before the brig (which has the Covenant drop ship that Keys will pilot at the end) on the lower level. The skull is inside the door farthest from where you initially enter the room and to the right. The door is locked and only lets enemies enter the fight, so you need to run for the door when it is opening lest you should lose your chance.