Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
Adept	Kill 1000 enemies.	30
Amateur	Kill 750 enemies.	30
Boss Destroyer	Kill twelve bosses.	30
Boss Hunter	Kill three bosses.	30
Boss Killer	Kill six bosses.	30
Burn The Space	Enter meteor storm three times.	30
Captain	Attain captain rank.	30
Colonel	Attain colonel rank.	100
Corporal	Attain corporal rank.	30
Gem Collector	Collect 25 gems.	30
Gem Hoarder	Collect 100 gems.	30
Gem Prospector	Collect 50 gems.	30
Gem Stockpiler	Collect 75 gems.	30
Harmless	Kill hundred enemies.	30
I Like Rocks	Enter asteroid field three times.	30
Laser Dance	Enter laser barrage three times.	30
Lieutenant	Attain lieutenant rank.	30
Looper	Finish a loop.	60
Major	Attain major rank.	60
Minesweeper	Enter minefield three times.	30
Mostly Harmless	Kill 250 enemies.	30
Novice	Kill 500 enemies.	30
Private	Attain private rank.	30
Rank Collector	Collect hundred ranks.	60
Sergeant	Attain sergeant rank.	30
Skilled	Kill 2500 enemies.	30
Space Pirate	Kill hundred transports.	30
The Dragon	Collect 150 gems.	30