1. Start the second level (Outskirts)

2. When you start the level you should see a door with blinking lights, go through this door.

3. As soon as your through this door look up at the lights. Jump on these.

4. When you are on the light turn in the direction of the way that you would normally go if you were going to do this level.

5. There is a dark brown wall in front of you. You can jump on this but when you are in the air you have to press the crouch button in order to pull up your feet to make it over the wall. This may take a few tries to get up there.

6. Once you are on this wall turn to your left and you should see a dark alley across the roof. Go down this alley.

7. At the end on the ground is some frag grenades, a camera, and a skull if you hold the X button you can pick up the skull. Picking up the skull will remove your HUD and you can't shoot a weapon or throw a grenade while holding the skull. The skull adds strength to your shields and your melee attack. Even if you throw the skull away you do not get your HUD back.

In order to get your HUD back you have to turn you X-box off and then back on.