The History: Then she is taken to the testing area to find a gun portals and meet Wheatley who will help her to escape in a capsule. Unfortunately, all they do is reactivate GLaDOS (the enemy) that immediately recognizes Chell. Chell flees to the areas of maintenance and defeat GlaDOS. Then GLaDOS is replaced by Wheatley, but he is corrupted by power. He transfers the brain of GLaDOS to a potato and Chell is sent to the old test chambers. In order to reach the chamber Wheatley, Chell and GLaDOS are forced to pass the tests of Wheatley. Once they arrive, they defeat Wheatley. Later Chell escapes from the facilities.
Characteristics:
Portal 2 comprises a series of puzzles that must be solved by teleporting the player's character and simple objects using the "portal gun", a device that can create inter-spatial portals between flat planes. Travelling through portals maintains the object's speed, some puzzles require the launching of the character or objects out one portal by gaining speed. Other gameplay elements were added to Portal 2, including beams, laser redirection, and special gels.
Gameplay video: