Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
Built to Last	Acquire 25 pickups (total)	50
Darkstar	Reach 250000 points in arcade mode (single player or co-op)	100
High Time	Reach maximum 10x combo meter.	100
Operator	Kill fifteen enemies in a single dead zone.	100
Ripple	Reach 100000 points in arcade mode (single player or co-op)	50
Standing on the Moon	Complete all missions.	50
Sugaree	Complete all achievements.	100
Supplication	Kill fifty Electron enemies.	50
Terrapin Station	Acquire each pickup once.	50
That's it for the Other One	Revive co-op partner in Arcade or missions.	100
The Eleven	Kill over ten enemies in a single dead zone.	50
Touch of Grey	Survive five minutes in Arcade mode (single player or co-op)	100
Unbroken Chain	Maintain a 10x combo for 10 seconds.	100