Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses
9/7/2011
11:46:24 AM
Very Rare 6.0%
Bridge Over Troubling Water
Complete the first Hard-Light Surfaces test
9/6/2011
11:53:50 PM
Common 62.8%
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course
9/6/2011
12:54:40 PM
Rare 15.7%
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them
9/6/2011
11:14:37 AM
Ultra Rare 3.9%
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course
9/5/2011
7:45:30 PM
Rare 20.6%
Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op
9/5/2011
6:58:05 PM
Very Rare 7.9%
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course
9/5/2011
1:08:38 PM
Rare 31.6%
Narbacular Drop
Place a portal under your co-op partner while they are gesturing
9/5/2011
12:16:29 PM
Very Rare 5.5%
Team Building
Complete all test chambers in the Team Building co-op course
9/5/2011
11:56:39 AM
Rare 46.8%