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

Confidence Building in Portal 2

Confidence Building14

Complete all test chambers in the Mass and Velocity co-op course

  • Unlocked by 7,139 tracked gamers (55% - TSA Ratio = 1.35) 13,047  
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