Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
Annihilator	You killed 2500 enemies!	25
Beast	You completed Campaign and Arena Modes as well as found all the secrets!	200
Berserker	You killed 100 enemies!	25
Corporal	You completed mission 5!	25
Destroyer	You killed 7500 enemies!	25
Eradicator	You killed 5000 enemies!	25
Eraser	You killed 1000 enemies!	25
Exterminator	You killed 10000 enemies!	25
Fighter	You completed Arena 1!	25
First Class	You completed mission 3!	25
Hacker	You hacked two computers!	25
Handyman	You repaired ten devices!	25
Judge And Executioner	You killed 120 pirates!	25
Liquidator	You killed 500 enemies!	25
Pest Control	You killed 12500 enemies!	25
Private	You completed mission 2!	25
Pugilist	You completed Arena 2!	25
Recruit	You completed Bootcamp!	25
Rookie	You completed mission 1!	25
Scrounger	You found all the secrets in the game!	65
Sergeant	You completed mission 6!	25
Slugger	You completed Arena 3!	25
Space Marshall	You completed Campaign mode!	70
Space Rebel	You killed 120 galactic troopers!	25
Spartacus	You completed Arena 4!	65
Specialist	You completed mission 4!	25
Staff Sergeant	You completed mission 7!	25
Survivor	You killed 10 enemies!	25