Portal 2 achievements
951
(510)

Portal 2

4.7 from 285 votes

There are a maximum of 51 Portal 2 achievements worth 951

7,123 tracked gamers have this game, 379 have completed it (5.32%)

Achievement Details

Preservation of Mass in Portal 2

Preservation of Mass14

Break the rules in Test Chamber 07

  • Unlocked by 3,601 tracked gamers (51% - TSA Ratio = 1.40) 7,123  
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