Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
Before They Make Me Run	Destroy 150 Pursuers.	70
Can I Get a Witness	Reach Room 50 in Arcade Mode.	100
Cool, Calm and Collected	Do not get hit for twenty Rooms in a row in Arcade Mode.	70
Dance Little Sister	Reach Room 20 in Arcade Mode.	25
Dirty Work	Destroy 150 Drones.	70
Driving Too Fast	Destroy 150 Crawlers.	70
Gimme Shelter	Destroy 150 Turrets.	70
Little by Little	Complete a Mission.	25
Might as Well Get Juiced	Acquire all Power-ups once.	50
Paint It Black	Complete all Missions.	100
Rough Justice	Complete all Achievements.	100
Time Is on My Side	Destroy 100 enemies while Evil Otto is in the room with you.	70
Too Rude	Reach Room 30 in Arcade Mode with "Powerless" enabled.	60
Too Tight	Reach Room 30 in Arcade Mode with "Iron Man" enabled.	60
Too Tough	Reach Room 30 in Arcade Mode with "Gravity" enabled.	60