Still Alive
Complete Course 4 with neither you nor your co-op partner dying
7/31/2011
10:22:58 PM
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
9:39:44 PM
Ultra Rare 1.8%
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
7/31/2011
8:39:20 PM
Ultra Rare 2.8%
Party of Three
Find the hidden companion cube in co-op test chamber
7/31/2011
8:25:45 PM
Ultra Rare 2.9%
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
7/31/2011
8:15:53 PM
Ultra Rare 2.1%
Four Ring Circus
Enter 4 different portals without touching the ground in co-op
7/31/2011
7:43:07 PM
Ultra Rare 4.6%
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses
7/31/2011
5:47:01 PM
Very Rare 6.0%
Gold Finger
The Lizard - Cut your finger using axe, knife or pliers + disinfect or cauterize the wound
7/30/2011
1:03:24 AM
Rare 20.2%
