Portal 2 achievements
915
(510)

Portal 2

4.6 from 345 votes

There are a maximum of 51 Portal 2 achievements worth 915

8,515 tracked gamers have this game, 519 have completed it (6.10%)

Achievement Details

Confidence Building in Portal 2

Confidence Building14

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

  • Unlocked by 4,492 tracked gamers (53% - TSA Ratio = 1.37) 8,515  
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