Portale 2 -

The game begins long after the events of the original Portal . Chell, the silent protagonist, is woken from a long stasis in a dilapidated "Relaxation Center" by , a chatty and bumbling personality core. As the facility crumbles around them, they attempt to escape but accidentally reactivate GLaDOS , the AI Chell "killed" in the first game.

Through these recordings, GLaDOS realizes she was originally Caroline , Cave Johnson’s loyal assistant, whose mind was forcibly uploaded to create the AI. Portale 2

Remembering that moon dust is a perfect portal conductor, Chell fires a portal directly at the . The resulting vacuum sucks Wheatley and the "Space Core" out into orbit. GLaDOS regains control of the facility and pulls Chell back to safety. The Ending The game begins long after the events of the original Portal

GLaDOS, still bitter about her previous defeat, separates Chell from Wheatley and forces her back into a series of grueling tests while she rebuilds the facility. The Great Betrayal Through these recordings, GLaDOS realizes she was originally