Portal Teaser Trailer (video)
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 | “I can't get over how small you are!” This article is a stub. As such, it is not complete. You can help Portal wiki by expanding it. |
Portal's teaser trailer, stated as Orientation Video No. 1, is a video which was released by Valve in 2006 in order to promote Portal, and The Orange Box. The video takes the form of an Aperture Laboratories information video, which introduces the viewer to portal mechanics.