Portal 2 achievements
942
(510)

Portal 2

4.7 from 310 votes

There are a maximum of 51 Portal 2 achievements worth 942

7,503 tracked gamers have this game, 425 have completed it (5.66%)

Achievement Details

Preservation of Mass in Portal 2

Preservation of Mass14

Break the rules in Test Chamber 07

  • Unlocked by 3,831 tracked gamers (51% - TSA Ratio = 1.39) 7,503  
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