This is just a map for Portal 2 that I have been working on, a small part of a much larger total thing.
This map obviously takes place in the Tartaros region of Aperture, or the underground cave system. I wanted to try and make an alternate story explaining what may have happened in some of the other shafts adjacent to Number 09. This is Shaft 07, or the Psychological Research Shaft. Eventually, I will release the entire mod/map pack containing at least ten maps or so, incorporating both puzzles and story.