Portal 2 achievements

Portal 2

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There are a maximum of 50 Portal 2 achievements worth 1,628 (1,000)

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Achievement Details

Party of Three in Portal 2

Party of Three47 (25)

Find the hidden companion cube in co-op test chamber

Achievement Guide for Party of Three

129,037 (81,482)
Achievement won on 20 Apr 11
TA Score for this game: 1,628
Posted on 20 April 11 at 06:44, Edited on 21 November 11 at 23:48
This solution has 88 positive votes and 6 negative votes. Please log in to vote.
This is found on Excursion Funnels: Chamber 9 in co-op mode.

Easily done split screen with two controllers but way more fun with a partner.

Not my video props to the guy who made it.
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