Portal 2 achievements
898
(510)

Portal 2

4.6 from 533 votes

There are 51 Portal 2 achievements worth 898

12,978 tracked gamers have this game, 905 have completed it (6.97%)

Achievement Details

Preservation of Mass in Portal 2

Preservation of Mass14

Break the rules in Test Chamber 07

  • Unlocked by 7,003 tracked gamers (54% - TSA Ratio = 1.36) 13,061  
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