Airspace Control
Kill 10 enemies while they use zip lines or are rappelling. (campaign only)
3/19/2013
2:19:08 PM
Very Rare 9.5%
Adapt and Overcome
Blow up 10 explosive objects, killing at least one enemy each time. (campaign only)
3/19/2013
11:31:42 AM
Rare 16.9%
Marksman - Small Arms
Kill 100 enemies with any pistol or SMG. (campaign only)
3/18/2013
4:16:05 PM
Rare 31.7%
Marksman - Heavy Arms
Kill 150 enemies with any heavy weapon. (campaign only)
3/18/2013
12:27:25 PM
Rare 18.7%
Marksman - Sniper
Kill 50 enemies with any sniper rifle. (campaign only)
3/18/2013
11:57:54 AM
Rare 22.5%
Situational Awareness
Stun an enemy by dumping sand on their head. (campaign only)
3/18/2013
11:33:56 AM
Rare 30.2%
The Human Factor
Kill an enemy by tagging him with a sticky grenade. (campaign only)
3/18/2013
10:17:19 AM
Rare 37.4%