Portal 2 achievements
915
(510)

Portal 2

4.6 from 346 votes

There are a maximum of 51 Portal 2 achievements worth 915

8,520 tracked gamers have this game, 519 have completed it (6.09%)

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 1,259 tracked gamers (15% - TSA Ratio = 2.59) 8,520  
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