Billing Displacement: Nancy Allen gets second billing (under Robert John Burke), despite having less screentime than Rip Torn (who appears in more scenes than her), and despite being killed off a third of the way through the film.
Creator Killer: Fred Dekker hasn't directed anything after the failure of this film.
Dyeing for Your Art: Because Orion wouldn't put up the cash to build new suits for Robert John Burke, he had wear a slightly modified version of the suits Peter Weller wore in RoboCop 2 and Burke had said it was painful after a short time.
The Other Darrin: Because of the costume and general similarity between Peter Weller and Robert John Burke, it isn't too noticeable, aside from the voice. In fact, this was one of the reasons Bruke was cast: Orion was starting to fail and they didn't want to put up the cash to make an entriely new suit, so they insisted they cast someone similar to Weller.
Refitted For Sequel: Plot elements like OCP forcing people to move from their homes with Rehab-forces and the donut shop scene with all the cops pulling their guns out came from Frank Miller's original scipt for RoboCop 2.