Portal 2 achievements
898
(510)

Portal 2

4.6 from 525 votes

There are 51 Portal 2 achievements worth 898

12,635 tracked gamers have this game, 875 have completed it (6.93%)

Achievement Details

Dual Pit Experiment in Portal 2

Dual Pit Experiment13

Do the same test twice

  • Unlocked by 7,980 tracked gamers (63% - TSA Ratio = 1.25) 12,665  

Achievement Guide for Dual Pit Experiment

AuthorSolution
Yazite
19,916
Yazite
Achievement won on 09 Feb 16
TSA Score for this game: 812
Posted on 10 February 16 at 14:14
This solution has 2 positive votes and 1 negative vote. Please log in to vote.
Story related and cannot be missed.

This is achieved at the very start of Chapter 8.
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