Portal 2 is a puzzle game presented from the first-person perspective. Normally, the player, as either Chell in the single-player campaign or as one of two robots, Atlas or P-body, in the co-operative campaign, can move, look, and carry and drop objects. The goal is to maneuver the characters through a number of test chambers in the Aperture Science facility and traverse the level from the start to the exit. Initial levels provide a tutorial on general movement controls and interactions with the environment. After these levels, the player will be required to solve puzzles in test chambers within the Aperture Science Enrichment Center using the "portal gun" (the Aperture Science Handheld Portal Device), a device that can create two portals connecting two surfaces across space. Players solve puzzles by using these portals to move unconventionally between rooms or to use the ability to fling objects or themselves across a distance. The functionality of the gun has not changed between the games, but within Portal 2, players can take advantage of the bleeding of other physical effects through the portals.[8] One is the ability to use air currents created by Pneumatic Diversity Vents, a series of transport pneumatic tubes, through a set of portal openings to push a turret over or to draw objects into the suction.Another example is the use the power of Excursion Funnel tractor beams through portals to bring Chell or other objects to otherwise inaccessible areas.

Minimum System Requirements * Processor: Intel Core 2.0 GHz, AMD Athlon 2800+ or better * RAM: 1.5GB * Graphics: NVIDIA GeForce 6800 GT, AMD Radeon 9800 Pro or better * VRam: 256MB of Graphics Memory * Hare Drive Space: 12GB * Sound Card: DirectX 9.0c Compatible * ODD: DVD-ROM * DirectX: DX9.0c * OS: Windows XP

Recommended System Requirements * Processor: Core 2 Duo/Athlon X2 or better * RAM: 1.5GB * Graphics Card: NVIDIA 7800 Series, ATI Radeon 1800 Series or better * VRam: 512MB of Graphics Memory * Hare Drive Space: 12GB * Sound Card: DirectX 9.0c Compatible * ODD: DVD-ROM * DirectX: DX10 * OS: Windows 7/Vista less