Sierra Hotel
Complete three chapters in a row without being killed or reloading a checkpoint.
7/1/2012
12:04:21 AM
Rare 13.7%
Marksman - Heavy Arms
Kill 150 enemies with any heavy weapon. (campaign only)
7/1/2012
12:00:44 AM
Rare 18.7%
Marksman - Small Arms
Kill 100 enemies with any pistol or SMG. (campaign only)
6/30/2012
11:19:59 PM
Rare 31.7%
The Human Factor
Kill an enemy by tagging him with a sticky grenade. (campaign only)
6/30/2012
9:24:16 PM
Rare 37.4%
Damn Close
Kill an Edged Weapon Expert while he is up to 5 meters away. (campaign only)
6/30/2012
7:51:59 PM
Rare 46.2%