Portal: Operation Wheatley

WARNING: PORTAL 2 SPOILERS

Chell has finally escaped the imprisonment of the Aperture Science facility. When she returns to the outside, though, she discovers that the world she knew is long gone.

While she tries to discover how to survive this new wasteland of a planet, she can't help but think about Wheatley whenever she looks at the moon at night. She truly believes that he's not a bad robot; he just needs improvement.

With the help of an unlikely ally, Chell now puts everything on the line, including her life, to travel across space to find the robotic orb. It's an adventure unlike anything you'd find in Aperture.