Portal 2

Portal 2

50 Achievements

1,000

15-20h

Xbox 360
Xbox One
Xbox Series
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Confidence Building

Confidence Building

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

10

How to unlock the Confidence Building achievement in Portal 2 - Definitive Guide

These are the second set of co-op chambers to complete. They are fairly straightforward, with the classic Portal feel to them. Most involve a cube or similar object and launching platforms. Good communication with your partner is a big help.
15
1

21 Apr 2011 13:01

This is the second course for the Portal 2 co-op campaign. The puzzles are still fairly easy to complete.

This video guide should help you.
14
0

30 Apr 2011 13:01

Story achievement. You need to pass the second series of tests. In the same series we should receive achievements:

1
0

22 Aug 2011 13:22