Portal 2
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1,548
(1,000)

Portal 2

4.7 from 6265 votes
 

60,836 tracked gamers have this game, 8,384 have completed it (13.78%) | 314 want to boost

There are a maximum of 50 Portal 2 achievements worth 1,548 (1,000)

Achievement Details

Confidence Building Achievement in Portal 2

Confidence Building12 (10)

Online/Offline - This achievement can be obtained in either an online or offline modeCooperative - This achievement can be obtained in non-versus game modes where players work together
Complete all test chambers in the Mass and Velocity co-op course

0.0Earn this in the Portal 2 Walkthrough

Achievement Guide for Confidence Building

AuthorSolution
APOPHIS1989
164,911
APOPHIS1989
Achievement won on 21 Apr 11
TA Score for this game: 1,513
Posted on 21 April 11 at 13:01
 This solution has 8 positive votes and 0 negative votes. Please log in to vote.
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.
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