From Portal Puzzle Wiki

Contents 1 Aperture Science Emergency Surprise System 2 Portal 2 Gamescom gameplay (720p cam) 3 Portal 2 E3 Teaser (720p) 4 Valve Backstage Gameplay and Interviews 5 Gameplay videos (720p) 6 Valve's channel 6.1 Meet Wheatley 6.2 Excursion Funnel 6.3 Aerial Faith Plate 6.4 Thermal Discouragement Beam 6.5 Pneumatic Diversity Vent 6.6 Repulsion Gel 6.7 Propulsion Gel 7 Other sources for videos

Aperture Science Emergency Surprise System

• http://www.youtube.com/watch?v=ijBSX9a-0Pw

Portal 2 Gamescom gameplay (720p cam)

• http://www.youtube.com/watch?v=LRxafex-1Ec

Portal 2 E3 Teaser (720p)

• http://www.youtube.com/watch?v=tax4e4hBBZc&hd=1

Valve Backstage Gameplay and Interviews

• http://www.ustream.tv/recorded/7684232
• http://www.youtube.com/watch?v=qQLpU0T-Sow

• http://gamevideos.1up.com/video/id/30024/bigger - Interview with Erik Wolpaw and Doug Lombardi
• http://www.youtube.com/watch?v=ebqdTFj9T2o - G4 interview with Doug Lombardi

• http://www.youtube.com/watch?v=w57fMy3PhJ4 - IGN interview with Doug Lombardi

• http://e3.gamespot.com/video/6266557/ - GameSpot's interview with Doug Lombardi

Gameplay videos (720p)

See Valve's Channel for individual videos.

• Part one : http://www.youtube.com/watch?v=5THiN8szSKM&hd=1

• Part two : http://www.youtube.com/watch?v=Bq2mZoKkqMw&hd=1

• Part three : http://www.youtube.com/watch?v=mGlyQmmvj0w&hd=1

Valve's channel

Also viewable at Portal 2 official site, and on the Steam Media Store.

Meet Wheatley

• http://www.youtube.com/watch?v=uZ-qLFxeBjE

Excursion Funnel

• http://www.youtube.com/watch?v=1oVpE40V9rE

Aerial Faith Plate

• http://www.youtube.com/watch?v=fE3B9uGnVlA

Thermal Discouragement Beam

• http://www.youtube.com/watch?v=yFRbGppLaUI

Pneumatic Diversity Vent

• http://www.youtube.com/watch?v=DOH6BprN9FI

Repulsion Gel

• http://www.youtube.com/watch?v=a7V0HBwHfEw

Propulsion Gel

• http://www.youtube.com/watch?v=Pcf99_DZZew

Other sources for videos

http://www.gametrailers.com/game/portal-2/12821 - GameTrailers's Portal 2 page

http://www.gamespot.com/pc/action/portal2/videos.html?tag=stitialclk%3Bgamespace - GameSpot's Portal 2 page - includes an interview with Doug Lombardi