The game consists primarily of a series of puzzles which must be solved by teleporting the player's character and other simple objects using the Aperture Science Handheld Portal Device (the "portal gun"). The goal of each puzzle is to reach an exit point. The "portal gun" and the unusual physics it creates are the emphasis of this game.

In Portal, the player character is tasked to navigate through a series of rooms, using the "Aperture Science Handheld Portal Device" (sometimes referred to as the "portal gun"), a unit that can create an inter-spatial portal between flat planes; however, not all surfaces are able to accommodate a portal, and moving surfaces will automatically close any portal existing on them.

System requirements Minimum:

1.7 GHz processor,
512 MB RAM,
DirectX 8 compatible video card,
Windows 2000/XP/Vista



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