Confidence Building achievement in Portal 2

Confidence Building

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

Confidence Building0
Online/OfflineCooperativeMain Storyline
Hide ads

Have you got any tips or tricks to unlock this achievement?
Add a guide to share them with the community.

Sign in and add a guide
Do you have a question about this achievement? Please post it in the Portal 2 Forum