Portal 2 achievements

0.28%

Portal 2 Platinum Trophy

Collected all other Portal 2 trophies

6.32%

Still Alive

Complete Course 4 with neither you nor your co-op partner dying

6.70%

Talent Show

Never lose a cube in Chamber 6 of the Mobility Gels co-op course

7.88%

Triple Crown

Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each

7.90%

Portal Conservation Society

Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements

8.94%

Iron Grip

Never lose a cube in Chamber 6 of the Mass and Velocity co-op course

9.67%

Party of Three

Find the hidden companion cube in co-op test chamber

10.31%

Smash TV

Break 11 test chamber monitors

10.64%

Friends List With Benefits

While playing co-op, hug 3 different people on your friends list

12.14%

Overclocker

Complete Test Chamber 10 in 70 seconds

12.90%

Professor Portal

After completing co-op, complete Calibration Course online with a friend who hasn’t played before

13.82%

Empty Gesture

Drop your co-op partner in goo while they are gesturing by removing the bridge under them