Tough Luck Skull
Skull Effect:All of your enemies will dive with incredible success away from your grenades, plasma pistol bolts, needles and vehicle splatter attempts.
Campaign Scoring Multiplier: 1.5x
Skull Location:The Tough Luck Skull is located near the middle of the third level, Tsavo Highway.
The Skull is located at the point in the level where you emerge from a tunnel and a huge covenant cruiser flies overhead. On the left there is some large piping following the road that you are driving on.
Underneath this piping are some support beams that extend out over a cliff. Jump onto the first of these beams, and travel to the end of it. Look to your left, and the Skull will be sitting on a rock extending from the edge of the cliff.