Portal 2 achievements
961
(510)

Portal 2

4.7 from 265 votes

There are a maximum of 51 Portal 2 achievements worth 961

6,775 tracked gamers have this game, 356 have completed it (5.25%)

Achievement Details

Professor Portal in Portal 2

Professor Portal27

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

  • Unlocked by 906 tracked gamers (13% - TSA Ratio = 2.73) 6,775  
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