Portal 2 achievements
918
(510)

Portal 2

4.6 from 390 votes

There are a maximum of 51 Portal 2 achievements worth 918

9,314 tracked gamers have this game, 581 have completed it (6.24%)

Achievement Details

Confidence Building in Portal 2

Confidence Building14

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

  • Unlocked by 5,049 tracked gamers (52% - TSA Ratio = 1.38) 9,645  
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