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apr 11, 2011 - Valve releases "Portal 2"

Description:

Sequel to Valve's insanely popular puzzle platformer, "Portal" which was released in the Orange Box, Portal 2 was just as successful

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Valve Corporation Timeline

ByConnor Callahan
22 Oct 2019
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Date:

apr 11, 2011
Now
~ 14 years ago
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