Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op
5/26/2011
4:28:21 PM
Very Rare 7.9%
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
5/26/2011
2:33:17 PM
Ultra Rare 2.8%
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses
5/25/2011
6:36:59 PM
Very Rare 6.0%
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course
5/25/2011
6:31:15 PM
Rare 15.7%
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course
5/24/2011
10:06:56 AM
Rare 20.6%
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course
5/23/2011
6:55:53 PM
Rare 31.6%
Team Building
Complete all test chambers in the Team Building co-op course
5/23/2011
5:27:36 PM
Rare 46.8%
