Easter Egg
Professor B
Professor B, located in the Industrial District, is a likely reference to Doc Brown from the "Back to the Future" movies. He claims to be from the future. When you complete the mission he offers, you'll unlock Factory 1.21 AM, which is a nod toward the 1.21 Gigawatts of energy required to power Doc Brown's contraption in the films.
Or will it be exclusive to PlayStation forever?