Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
Collateral Damage	Kill an enemy by causing a fire extinguisher to explode.	90
Empty Walls	Clear Chapter 8.	100
End Of The Line	Get yourself killed.	90
Knock, Knock	Kill an enemy by slamming them with a door.	90
My Stomach Can't Take This	Find the vomiting cop.	90
Rock On, Dude!	Find the young punk rockers.	90
Rocket Man	Kill an enemy using a Rocket Launcher.	90
Simon	Clear Chapter 4.	90
Slaughter	Clear Chapter 6.	90
The Detective	Clear Chapter 2.	90
Wrenched Apart	Kill an enemy using a Wrench.	90