After being abandoned in the depths of Aperture, you are awoken from a stasis pod mysteriously after an unknown amount of time and need to ascend through the facility to escape.

TBA

You have to traverse around the Behind the Scenes areas of Aperture, going from the bottom to the top of Aperture through test chambers, modern, old, and overgrown environments over the course of the game.

In chambers you come across Schrödinger cubes, a cube type reminiscent of Discouragement Redirection Cubes, Mobility Gels, Aerial Faith Plates, and Excursion Funnels.