PC Action2 out of 67
Looted A Body
PlayStation 3 Action1 out of 51
Written in the Clouds
5 out of 246
I Know a Secret
Find a secret room
PC Action1 out of 50
One Smart Cookie
Complete one optional tomb.
PlayStation 3 Action26 out of 45
Use the Co-op overload to kill 60 enemies.
PlayStation 3 Action33 out of 65
Completed the mission without losing a humvee in Operation Exodus
PlayStation 3 Action9 out of 53
Choose Kuo in Storm the Fort.
PC Strategy16 out of 70
Have maximum relations with all foreign powers
6 out of 300
The Way of the Voice
Complete "The Way of the Voice"
PC Action29 out of 530
Plant a bomb within 25 seconds (excluding Demolition mode)
PC Action20 out of 1794
Kill a Scout in midair with your Sniper Rifle or the Huntsman.
Xbox 360 Action24 out of 95
Complete a Co-Op mission without dying.
Xbox 360 Action20 out of 54
Invite a friend to join and participate in a CO-OP Story or game mode session
Xbox 360 Action33 out of 50
After completing co-op, complete Calibration Course online with a friend who hasnt played before