Portal 2 Preview - NGN

New Game Network writes: "Valve was showing off some new aspects of Portal 2 at PAX 2010 last weekend chronicling the game’s full-length cooperative game mode officially titled the “Cooperative Testing Initiative.” After being shuffled into a small room inside Valve’s expo booth and sat down alongside a small group of fellow game journalists and PAX attendees, one individual was chosen from the audience to play alongside a Valve team member while a Valve representative narrated the demonstration."

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