1. Portal 2 Achievements
  2. Confidence Building achievement
Portal 2

Portal 2

899
51
4.63
Game action
Portal 2
Solaris

Solaris

899
51
19 Apr 13
19 Feb 19
32h 36m
100%
Solaris

Confidence Building achievement in Portal 2

Confidence Building

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

Confidence Building0
19 November 2017Online/Offline - These achievements can be obtained in either an online or offline game mode.Cooperative - These achievements can be obtained by two or more players in a cooperative game mode who have met the achievement requirements.Main Storyline - These achievements are gained automatically by progressing through the main game mode.
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