Portal 2 achievements
953
(510)

Portal 2

4.7 from 282 votes

There are a maximum of 51 Portal 2 achievements worth 953

7,095 tracked gamers have this game, 378 have completed it (5.33%)

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 956 tracked gamers (13% - TSA Ratio = 2.71) 7,095  
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