Portal 2 E3 2010 Demo Trailer #4 and #5

These clips show off two new gameplay tools: Pneumatic Diversity Vents and the Thermal Discouragement Beams
Valve has released a couple of new movies for Portal 2, showcasing this sequel set to be available in 2011, for PC and PS3. Portal was originally released in 2007 and earned over 70 industry achievement awards.