Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
Alice in Chain-reaction	Kill an elf with a chain reaction.	100
Bird or a plane?	Blow up five enemies.	90
Elfmaggedon	Kill 50 enemies.	90
Give me more firepower!	Unlock a new weapon.	90
He was an angry elf	Kill an elf.	90
Packing a punch	Upgrade a weapon.	90
Rescue service	Save 25 hostages.	90
Rex approved	Kill 25 enemies with a water pistol.	90
Smells like burnt turkey	Kill 25 enemies with a flamethrower.	90
Untouchable	Complete a stage without getting hit.	90
Video killed the Christmas star	Kill an elf watching TV.	90