Portal 2 achievements
917
(510)

Portal 2

4.6 from 359 votes

There are a maximum of 51 Portal 2 achievements worth 917

8,792 tracked gamers have this game, 544 have completed it (6.19%)

Achievement Details

Confidence Building in Portal 2

Confidence Building14

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

  • Unlocked by 4,769 tracked gamers (52% - TSA Ratio = 1.38) 9,169  
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