Portale 2 May 2026

They return to the modern facility to find Wheatley has made a complete mess of things, pushing the reactor toward a core meltdown. In the final battle, Wheatley booby-traps the room, but Chell notices the roof has been torn open, revealing the night sky.

However, the power immediately goes to Wheatley's head. He becomes a megalomaniacal tyrant, shoves GLaDOS’s consciousness into a , and—in a fit of rage—sends both Chell and "PotatOS" falling miles down an elevator shaft into the oldest parts of the facility. The History of Aperture

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.

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

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, .

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