Schrodinger's Catch
Catch a blue-painted box before it touches the ground
8/2/2011
3:27:37 PM
Very Rare 6.9%
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before
8/2/2011
12:24:31 PM
Ultra Rare 1.7%
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them
8/2/2011
12:13:09 AM
Ultra Rare 3.9%
Final Transmission
Find the hidden signal in one of the Rat Man's dens
8/1/2011
10:56:15 PM
Very Rare 7.7%
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list
8/1/2011
4:43:37 PM
Ultra Rare 1.4%
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses
7/30/2011
1:38:40 AM
Very Rare 6.0%
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course
7/29/2011
9:52:08 PM
Rare 15.7%
