Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock	Points
A.I. Training	Spend your first EXP point.	10
Brain-hacker	Perform 30 stealth kills.	90
Cyborg	Defeat 350 enemies.	90
Flatline	Perform 15 stealth kills.	30
Gravity Bender	Throw 50 objects using telekinesis.	90
Hunter	Hit enemies 500 times with telekinesys bullets.	30
Lifter	Lift 25 enemies.	30
Mind Over Matter	Throw 25 objects using telekinesis.	30
No Place to Hide	Hit enemies 1000 times with telekinesys bullets.	90
Sniper	Perform 75 headshots.	30
Unstoppable	Defeat 250 enemies.	30
Veteran Sniper	Perform 150 headshots.	90
Zero Gravity	Lift 50 enemies.	90