Valve shows more Portal 2 E3 demo gameplay

More Portal 2 gameplay goodness coming your way guys as Valve releases parts four and five of the games E3 demo presentation. Learn more about the Pneumatic Diversity Vents and the Thermal Discouragement Beams after the jump!

More Portal 2 gameplay goodness coming your way guys as Valve releases parts four and five of the games E3 demo presentation. Learn more about the Pneumatic Diversity Vents and the Thermal Discouragement Beams in this brand new vids.