Portal 2 achievements
918
(510)

Portal 2

4.6 from 390 votes

There are a maximum of 51 Portal 2 achievements worth 918

9,314 tracked gamers have this game, 581 have completed it (6.24%)

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 1,445 tracked gamers (15% - TSA Ratio = 2.58) 9,652  
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