Energy as Batteries: Unlike many NES games where you only lose health when hit, RoboCop's health constantly depletes just by moving, mimicking a robot running on a limited battery life.
Cinematic Loyalty: The NES version is widely considered more faithful to the 1987 film's plot than other ports. It includes specific scenes like the City Hall standoff and even lets you confront the primary villain, Clarence Boddicker, who was missing from several other versions.