Portal 2 is a puzzle-platform game developed by Valve and released for PlayStation 3 in 2011. It continues the story of Chell, the protagonist from the first game, as she teams up with a personality core named Wheatley. The duo faces challenging puzzles crafted by the malevolent AI GLaDOS in an effort to escape the Aperture Science facility. The game features an expanded narrative and innovative gameplay mechanics.
Sequel to the acclaimed Portal (2007), Portal 2 pits the protagonist of the original game, Chell, and her new robot friend, Wheatley, against more puzzles conceived by GLaDOS, an A.I. with the sole purpose of testing the Portal Gun's mechanics and taking revenge on Chell for the events of Portal. As a result of several interactions and revelations, Chell once again pushes to escape Aperture Science Labs.