Portal 2 achievements
904
(510)

Portal 2

4.6 from 501 votes

There are 51 Portal 2 achievements worth 904

11,840 tracked gamers have this game, 795 have completed it (6.71%)

Achievement Details

Preservation of Mass in Portal 2

Preservation of Mass14

Break the rules in Test Chamber 07

  • Unlocked by 6,312 tracked gamers (53% - TSA Ratio = 1.36) 11,904  
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