Team Building
Complete all test chambers in the Team Building co-op course
5/26/2011
11:19:09 AM
Rare 46.8%
Bridge Over Troubling Water
Complete the first Hard-Light Surfaces test
5/22/2011
12:17:38 AM
Common 62.8%
Clean Cut
Sever all three tentacles of a Lurker with one Line Gun Primary Fire shot (single player only)
5/9/2011
7:29:50 AM
Rare 21.7%
Vacuum Cleaner
Decompress 20 Necromorphs without getting sucked out yourself
5/9/2011
6:58:17 AM
Very Rare 6.9%