Portal 2 achievements
908
(510)

Portal 2

4.6 from 450 votes

There are a maximum of 51 Portal 2 achievements worth 908

10,302 tracked gamers have this game, 660 have completed it (6.41%)

Achievement Details

Professor Portal in Portal 2

Professor Portal26

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

  • Unlocked by 1,560 tracked gamers (15% - TSA Ratio = 2.56) 10,315  
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