This is a video of Portal Prelude, a Portal fan game by Builderboy2005, written in Axe programming language for the TI-83 Plus and TI-84 Plus series of graphing calculators, similar to the Flash clone for being in 2D.
It was finished and released on December 1st 2012 at omnimaga.org/index.php?action=downloads;sa=view;down=841
Discussion forum omnimaga.org/index.php?board=87.0
The Still Alive song cover used in the video was made by Albion (DavidXNewton). furaffinity.net/view/1900681/
On September 13th, 2012, Valve received another mysterious crate from WETA Workshop. Inside was a full-scale, articulated Portal turret, complete with a motion sensor. Once again, WETA Workshop’s gone far, far beyond our expectations to deliver something truly amazing.