Still Alive
Complete Course 4 with neither you nor your co-op partner dying
8/3/2011
10:45:39 AM
Ultra Rare 1.4%
Triple Crown
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
7/31/2011
10:11:44 PM
Ultra Rare 1.8%
Party of Three
Find the hidden companion cube in co-op test chamber
7/31/2011
9:57:02 PM
Ultra Rare 2.9%
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
7/31/2011
9:36:34 PM
Ultra Rare 2.8%
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
7/31/2011
9:24:57 PM
Ultra Rare 2.1%
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list
7/31/2011
8:42:40 PM
Ultra Rare 1.4%
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before
7/31/2011
8:33:07 PM
Ultra Rare 1.7%
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses
7/31/2011
6:49:57 PM
Very Rare 6.0%
