Portal 2 achievements

0.35%
Portal 2 Platinum Trophy
Collected all other Portal 2 trophies
6.02%
Still Alive
Complete Course 4 with neither you nor your co-op partner dying
6.43%
Talent Show
Never lose a cube in Chamber 6 of the Mobility Gels co-op course
7.71%
Triple Crown
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
7.79%
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
8.86%
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
9.78%
Party of Three
Find the hidden companion cube in co-op test chamber
10.24%
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list
10.44%
Smash TV
Break 11 test chamber monitors
12.51%
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before
12.55%
Overclocker
Complete Test Chamber 10 in 70 seconds
14.00%
Four Ring Circus
Enter 4 different portals without touching the ground in co-op