Adapt and Overcome
Blow up 10 explosive objects, killing at least one enemy each time. (campaign only)
8/9/2012
6:33:37 AM
Rare 16.9%
Sierra Hotel
Complete three chapters in a row without being killed or reloading a checkpoint.
8/9/2012
5:42:39 AM
Rare 13.7%
All You Can Be
Complete any chapter with 60%+ accuracy without dying or reloading a checkpoint.
8/9/2012
5:29:06 AM
Ultra Rare 4.3%
Marksman - Heavy Arms
Kill 150 enemies with any heavy weapon. (campaign only)
8/9/2012
4:11:50 AM
Rare 18.7%
Situational Awareness
Stun an enemy by dumping sand on their head. (campaign only)
8/8/2012
7:10:54 AM
Rare 30.2%