Portale 2 -

Portal 2 is a direct sequel that expands the lore of Aperture Science, taking place centuries after the first game. Below is the complete narrative arc of the single-player story. The Awakening and GLaDOS's Return

Chell and PotatOS land in the abandoned 1950s-era labs. As they climb back up through the decades (the 60s, 70s, and 80s), they hear pre-recorded messages from Aperture’s founder, .

Wheatley eventually helps Chell escape the test chambers. Together, they sabotage GLaDOS's turret and neurotoxin production lines. They confront her in the central control room and perform a "core transfer," replacing GLaDOS with Wheatley. Portale 2

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

Realizing Wheatley is dangerously incompetent and will accidentally destroy the entire facility, GLaDOS and Chell form an uneasy alliance to take him down. The Finale: To the Moon Portal 2 is a direct sequel that expands

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.

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 As they climb back up through the decades

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