'''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 Science|Aperture Laboratories]] information video, which introduces the viewer to portal mechanics.
'''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 Science|Aperture Laboratories]] information video, which introduces portal mechanics.
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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 portal mechanics.
