Literature
3. The Hunt - GLaDOS
Although she didn't want to admit it, the nano problem was getting worse, despite all she did to stop it. Eventually, the only logical choice in her mind left was that if you can't combat the problem; run. She ordered all the nanobots in the still-clear sectors to her chamber immediately, and she locked them in with Orange and Blue. She vacuum-sealed the room, disconnected everyone from the Aperture servers to place them on her own secure server, and took attendance of her remaining army.
Sadly, two cooperative testing bots and 3/8 of her original nanobot work crews were all she had to show for Apertures' progress over the last couple decade