Halo 2

In the multiplayer map Zanzibar, there should be a computer on the upper level on the defense side that opens up the main gate into the base. After you activate this, the screen goes blue with the infamous BSOD.

Here the 411 on the newest enemy that has been added to the covenant armada. They are the giant creatures deemed holy by the covenant called Brutes.

When you are the Master Chief trying to recover the index from the Prophet of Truth on the Covenant Holy City go until you reach the first outdoor area with dirt and vegetation. Take a right as you enter this room and run up to the wall past the gravity lift that leads up to the sniper point. Get on top of the wall by going up the dirt mound on your left. Follow the wall until you reach the floating skull called "Angry".

If someone is beating on the door of your tank get out and shoot them in the face or energy sword them and make sure to get out before the 3rd hit or the boarder will kill you and youll lose your precious tank.

A skull similar to the one that activates blind mode can be found if you Start on "regret". After the first lift ride (before the first underwater elevator), grenade jump from the front awning of the lift to the ledge in front of you (the one with two turrets).

Grenade jump AGAIN onto the next ledge.

Make your way to the back of the building. On Easy, you'll only find the skull. On Legendary, however, 2 invisible Elites carrying swords just shake their heads wildly, ignoring you completely.