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Portal: Still Alive is an Xbox 360 Live Arcade exclusive edition of Portal released on October 22, 2008. It features the original game, with various new levels and nine new achievements.
The additional content was modified from and based on the levels from the Portal - The Flash Version MapPack created by We Create Stuff, and contains no additional story-related levels. There was a slight change in the campaign, which included avoiding being crushed whilst going through a series of engines.