This page contains Portal 2 Hints for PC - Windows called "Hidden Room in Chamber 17" and has been posted or updated on Jul 6, 2011 by Estonia. Let us know what you think of this Hint by thumbs voting.
Hidden Room in Chamber 17
As you enter Test Chamber 17 in Chapter 3, look at the black wall high up to the left. There's a retracted plate there and you can portal the lightbridge to get over to it. Behind the retracted plate lies a mysterious, secret room filled with cups. There's also some art and a poem on the wall.
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