Portal Steam Gift Platform: Steam Release Date: 10/10/2007 Product Description Portal is a new single player game from Valve. Set in the mysterious Aperture Science Laboratories, Portal has been called one of the most innovative new games on the horizon and will offer gamers hours of unique gameplay. The game is designed to change the way players approach, manipulate, and surmise the possibilities in a given environment; similar to how Half-Life 2's Gravity Gun innovated new ways to leverage ...
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