This level started out as a basic pen and paper sketch.
The early concept for the level was for the currently existing level to be surrounded by an additional layer of corridors and offices, hiding the clandestine agency from outside view. The office was only to be accessible once players interact with three Polybius arcade machines, after which a suspisciously large vending machine would open up.
However, after initial testing, it became obvious that the "exterior" section of the level didn't flow well. Wrapping an extensive network of rooms around the hidden center resulted in long distances for players to traverse.
Thus, the decision was made to trim the fat and rebuild the level to focus on the part that was compelling, which is the agency itself.