Portal 2
From SI410
Portal 2 is a first person puzzle game made by Valve. It was released in 2011 for Windows, Mac, PS3 and Xbox 360. Cite error: Invalid <ref>
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Contents
Plot
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Gameplay
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Reception
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Impact
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References
http://www.ign.com/articles/2010/12/22/portal-2-gets-a-final-release-date