Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Like taking candy from a baby (20 points)	Occupied all control points in Control Point mode.
Gold Hammer (30 points)	Cleared the game on Normal difficulty or harder without losing a life.
May Day King (30 points)	Got shot down 256 times.
Ruler of the Universe (50 points)	Earned every rank.