Portal: Still Alive features the full Portal single-player game plus a new challenge mode. Designed to change the way players approach, manipulate and surmise the possibilities in any given environment. Solve physical puzzles and challenges by opening portals to maneuvering objects, and yourself, through space. According to Valve the added content is taken from Hen Mazolski's Portal: The Flash Version MapPack, freely available on PC.
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'Portal: Still Alive' (X360) Has No Exclusive Content
by Rainier on July 21, 2008 @ 9:51 a.m. PDT
Portal: Still Alive features the full Portal single-player game from Valve plus a new challenge mode. Designed to change the way players approach, manipulate and surmise the possibilities in any given environment, Portal has you solve physical puzzles and challenges by opening portals to maneuvering objects, and yourself, through space.