Portal 2 Coop Gameplay trailer in HD September 9, 2010 by Gameranx StaffPortal 2 Coop Gameplay trailer in HD Valve has released the Portal 2 Coop trailer shown at PAX in HD. You can check out the trailer here Related About Gameranx Staff Previous Post:Halo Reach Walkthrough Video Guide in HD (Xbox 360) Next Post:Top 10 PlayStation Network | PSN Games
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