Prologue: Reconstruction
"*Bzzzzzztttt*.Chell?*Bzzzzzztttt*. Project Fail*Bzzzzzzttt*" The robotic voice of a woman sounded in the distance of the empty and messed underground Facility. Sparks flew all over the place and grounds were on fire. Rooms were filled with gas and power surged through the walls of individual rooms.
"Project *Bzzzzzzztttt*. Reboot sys*bzzzzzzttt*. Commence Dimensional Por*bzzzzzttt*." The AI known as GLaDOS spoke, its voice echoing through the halls closest to it. As it spoke, a red portal opened up beneath it and GLaDOS (having taken refuge in a companion cube through a core transference) fell through it. The Red Portal had no secondary exit portal for GLaDOS to escape out of. But it knew that such an exit wasn't necessary. GLaDOS fell through a self-made red portal, like a wormhole, and landed on the ground of a place without metal. It was outside in another dimension.
"Dimensional Portal Travel complete. Commencing reconstruction of Aperture Science Laboratories." it said. Fortunately for GLaDOS, a local inhabitant of this new dimension happened to be walking by. He was an anthropomorphic canine in appearance. His eyes brown and his fur black. He wore clothing that suited a farmer during the first few years of the twenty first century back in GLaDOS' dimension. He noticed the small cube and picked it up.
"Whoa! This thing's heavy." he said, quickly walking away. He returned a few minutes later with a Ute and managed to haul GLaDOS onto the trailer. As he drove off, GLaDOS began to plan out how it would take over this animal world for its own gain. Its plan wasn't revealed until several years later. GLaDOS, having been sold to the highest bidder was studied and improved upon. Recieving a brand new body of its own, it rebelled against the animals, doing exactly the same thing as it once had with humanity. GLaDOS had exterminated the inhabitants of an entire city.
Over time, GLaDOS' power grew and the surrounding cities grew too fearful of it, deeming it a city that was banned from being entered. Unfortunately, that meant no rescues were allowed to be conducted. And GLaDOS hadn't killed everyone within that city.