You shall not pass!
While on defense, prevent the attackers from completing their first objective
5/14/2011
10:47:43 PM
Rare 37.1%
You've saved the Ark
Win all main missions of the Security campaign (not including What-If missions)
5/14/2011
10:47:32 PM
Rare 13.4%
Use the wheel, earn more XP
Complete an objective after first selecting it on the Objective Wheel
5/14/2011
6:56:54 PM
Rare 47.0%
Smart decisions win battles
Attempt to Revive an objective-class teammate over a non-objective teammate near a Primary Objective
5/12/2011
5:12:15 PM
Rare 15.7%
The start of something big
Win any mission, whether campaign or What-If
5/12/2011
4:25:41 PM
Common 64.4%
Not over till the fat lady sings!
Take down an enemy with gunfire while knocked down
5/12/2011
4:18:14 PM
Common 62.5%
Team Building
Complete all test chambers in the Team Building co-op course
4/22/2011
10:46:35 PM
Rare 46.8%
Schrodinger's Catch
Catch a blue-painted box before it touches the ground
4/21/2011
11:40:41 AM
Very Rare 6.9%
Final Transmission
Find the hidden signal in one of the Rat Man's dens
4/21/2011
10:51:16 AM
Very Rare 7.7%
