Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock
Abduction (20 points)	Complete Level 5.
Angel of Death (60 points)	Complete all assassinations in a level using only accidents.
Calling Card (20 points)	Complete Level 6.
Castaway (20 points)	Complete Level 7.
Chameleon (80 points)	Obtain all disguises in the game.
Checked Out (20 points)	Complete Level 2.
Contract Killer (90 points)	Complete a Level without Killing (except for assassination targets).
Deadly Ending (20 points)	Complete Level 4.
Deadly Instinct (40 points)	Complete a level without using instinct mode.
Engineer (30 points)	Perform a perfect rewiring (sabotage minigame).
Fireproof (20 points)	Complete Level 3.
Go For The Throat (30 points)	Garrote 30 enemies.
Goodbye, Colonel (20 points)	Complete Level 8.
Head Hunter (30 points)	Get 30 Headshots.
Legendary (80 points)	Complete game without killing (except for assassination targets).
Like a Ghost (50 points)	Obtain Ghost Ranking on a level.
Locksmith (40 points)	Perfect lockpicking attempt.
Maniac (40 points)	Obtain Maniac Ranking on a level.
Once Upon a Time (20 points)	Complete Level 1.
One Suit Man (50 points)	Complete a level using one disguise or less.
Peace (20 points)	Complete Level 11.
Predator (100 points)	Complete a level without using your gun.
Public Enemy (20 points)	Complete Level 10.
Sleeper Agent (30 points)	Use Chloroform on 30 enemies.
Top Shot (20 points)	Complete Level 9.
Undertaker (30 points)	Hide 30 bodies.