Bridge Over Troubling Water
Complete the first Hard-Light Surfaces test
4/21/2011
9:25:35 PM
Common 62.8%
Narbacular Drop
Place a portal under your co-op partner while they are gesturing
4/21/2011
3:47:28 AM
Very Rare 5.5%
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses
4/21/2011
3:19:48 AM
Very Rare 6.0%
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course
4/21/2011
12:43:44 AM
Rare 15.7%
Four Ring Circus
Enter 4 different portals without touching the ground in co-op
4/21/2011
12:05:01 AM
Ultra Rare 4.6%
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course
4/20/2011
4:22:36 AM
Rare 20.6%
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course
4/20/2011
2:51:56 AM
Rare 31.6%
Team Building
Complete all test chambers in the Team Building co-op course
4/20/2011
1:51:04 AM
Rare 46.8%
World Number One
Earn at least 3 stars in each of the mixes in the Tiësto Megamix (in Quickplay, Megamixes, Empire or Star Battle).
2/23/2011
5:00:54 AM
Rare 27.4%