Portal 2 achievements
905
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Portal 2

4.6 from 431 votes

There are a maximum of 51 Portal 2 achievements worth 905

9,965 tracked gamers have this game, 643 have completed it (6.45%)

Achievement Details

Dual Pit Experiment in Portal 2

Dual Pit Experiment13

Do the same test twice

  • Unlocked by 6,332 tracked gamers (63% - TSA Ratio = 1.25) 10,076  

Achievement Guide for Dual Pit Experiment

AuthorSolution
Yazite
17,781
Yazite
Achievement won on 09 Feb 16
TSA Score for this game: 817
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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