Videos

Valve has released a number of videos over the years in order to promote the Portal games, and in order to demonstrate gameplay mechanics. Some videos were designed to showcase "Testing Elements", while others focused upon key characters or were produced specifically for journalists and critics and were displayed at large conventions such as. The following is a list of all official Portal-related videos that have been released by Valve.

Promotional

 * Portal Teaser - A promotional video showcasing the gameplay of the original Portal.

Other

 * Portal is Free - A video featuring the voice of GLaDOS that announced that Portal could be acquired for no cost for a limited time.

Aperture Investment Opportunity

 * Panels - An Aperture Science promotional video featuring the voice of Cave Johnson, which demonstrates Panel technology to prospective investors.
 * Bot Trust - An Aperture Science promotional video featuring the voice of Cave Johnson, which demonstrates co-operative robotics technology to prospective investors.
 * Turrets - An Aperture Science promotional video featuring the voice of Cave Johnson, which demonstrates Turrets to prospective investors.
 * Boots - An Aperture Science promotional video featuring the voice of Cave Johnson, which demonstrates the Long Fall Boots to prospective investors.

Promotional

 * Portal 2 Teaser - A promotional video showcasing gameplay and plot elements of Portal 2.
 * Co-op Trailer - A promotional video showcasing the Co-op campaign in Portal 2.
 * TV Advertisement - A television advertisement promoting the forthcoming game.
 * Game Launch TV Advertisement - A television advertisement promoting the game's release.

Testing Elements

 * Excursion Funnel - Portal 2 gameplay footage showcasing the function and use of the Excursion Funnel.
 * Aerial Faith Plate - Portal 2 gameplay footage showcasing the function and use of the Aerial Faith Plate.
 * Aerial Faith Plate #2 - A second video featuring footage showcasing the function and use of the Aerial Faith Plate.
 * Thermal Discouragement Beam - Portal 2 gameplay footage showcasing the function and use of the Thermal Discouragement Beam.
 * Pneumatic Diversity Vent - Portal 2 gameplay footage showcasing the function and use of the Pneumatic Diversity Vent.
 * Propulsion Gel - Portal 2 gameplay footage showcasing the function and use of Propulsion Gel.
 * Repulsion Gel - Portal 2 gameplay footage showcasing the function and use of Repulsion Gel.
 * Repulsion Gel #2 - A second video featuring footage showcasing the function and use of Repulsion Gel.

Other

 * Meet Wheatley - A video introducing Wheatley, the player's initial guide in Portal 2.
 * Wheatley Update - A video that provides more information about Wheatley, and also reveals more about Portal 2's plot.
 * Valentine's Day Gift Buying - A "Romance Safety Compliance Guide" released for the benefit of Aperture Science employees.
 * Portal 2: Perfect 10 - A promotional video featuring pre-rendered footage and statements from a number of complimentary game reviews.