Portal was a test-bed. Portal 2 is a game."
—Doug Lombardi

Portal 2 is a first-person puzzle video game developed and published by Valve Corporation. It was released on April 19, 2011 for PC, PlayStation 3 and Xbox 360. Portal 2 is a sequel to Portal.
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The gameplay of Portal 2 is based on its predecessor Portal, where the player, with the use of portals, solves puzzles. New gameplay elements such as Mobility Gels, the Aerial Faith Plate and the Thermal Discouragement Beam were implemented as means for the player to master in order to solve puzzles.

Chell no longer wears the Advanced Knee Replacement, but instead suited in the new Aperture Science Long Fall Boots. Combat plays a slightly larger role than in the last game, seeing as Chell is always meeting with enemies along the way.
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Cooperative play is a new game mode introduced to Portal 2. The campaign features two characters, ATLAS and P-body. The two players must work together to pass tests and areas outside the test chambers. The developers implemented robotic characters in order to ease explanation of a respawning system, giving the story explanation that humans could not be trusted.

The gameplay is very similar to single-player mode, with the addition of object-specific buttons and tools to aid in cooperative play, as well as 8 gestures.

The Co-op campaign also contains whiteboards with writings found in images from The Potato Sack, That are found in final test chambers, that are out of the testing track.

Epicooo

Thats a demo but i loved it ples add me and give me PLS