Chell thought she had escaped her prison but, while contemplating her history, she received a startling revelation: The nightmare wasn't over, it only just began. Enter the Enrichment Center as you've never seen it before. You will meet "our benefactors", an all-new character, and discover Aperture's darkest secret. (While this mod has ceased development, the 5 map demo is still playable.)
We all know that feeling.