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

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.

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

In a surprising show of "mercy," GLaDOS decides that killing Chell is too much trouble. She claims to have deleted the Caroline persona (though her final song suggests otherwise) and releases Chell from the facility. Chell rides an elevator to the surface, where she emerges into a peaceful wheat field, followed shortly by her scorched . com/wiki/Cave_Johnson">backstory of Cave Johnson ? Portal 2 In 6 Minutes

Watch these recaps to see the story of Portal 2 in action: Portal 2 In 6 Minutes YouTube · Northern Bob Portal 2 (Story Condensed) YouTube · haybe The Story of Portal 2 in 5 Minutes YouTube · Timmy Boots

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