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Valve shows off new Portal 2 gameplay

Check out CVG's behind-closed-doors video here

Valve showed us a load of new Portal 2 gameplay behind closed doors at E3 - and we caught it all on camera for you.

As explained in our written preview earlier, we were privy to a host of new features - including some very cool gel-based additions.

Check out the video below to see Valve's Erik Johnson talk us through the new game - and catch planty of new gameplay footage.

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