Portal 2 achievements
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Portal 2

4.6 from 327 votes

There are a maximum of 51 Portal 2 achievements worth 908

7,908 tracked gamers have this game, 492 have completed it (6.22%)

Achievement Details

Dual Pit Experiment in Portal 2

Dual Pit Experiment13

Do the same test twice

  • Unlocked by 5,030 tracked gamers (64% - TSA Ratio = 1.25) 7,908  

Achievement Guide for Dual Pit Experiment

AuthorSolution
Yazite
15,970
Yazite
Achievement won on 09 Feb 16
TSA Score for this game: 503
Posted on 10 February 16 at 14:14
This solution has 1 positive vote 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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