Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock
Berzerker I (20 points)	Deploy 1 overload.
Berzerker II (40 points)	Deploy 3 overloads.
Berzerker III (100 points)	Deploy 5 overloads.
Collector I (20 points)	Collect 5 pickups.
Collector II (40 points)	Collect 10 pickups.
Collector III (100 points)	Collect 20 pickups.
Destroyer I (20 points)	Kill 30 enemies.
Destroyer II (40 points)	Kill 90 enemies.
Destroyer III (100 points)	Kill 180 enemies.
Hunter I (30 points)	Beat highscore of 20,000.
Hunter II (50 points)	Beat highscore of 40,000.
Hunter III (120 points)	Beat highscore of 80,000.
Killer I (20 points)	Kill 1 boss.
Killer II (40 points)	Kill 2 bosses.
Killer III (100 points)	Kill 4 bosses.
Loser I (20 points)	Lose 3 ships.
Loser II (40 points)	Lose 9 ships.
Loser III (100 points)	Lose 18 ships.