A Reploid, or in the original Japanese games, from the science fiction video game series Mega Man X and Mega Man Zero, is a robot with complete free will and thought processes comparable to that of humans. The term originally was reserved for robots whose design was ultimately derived (or "replicated") from the original Mega Man X design, but throughout the series the term has been extended to cover any robot with similar intellectual capacity. Some fans of the series commonly use the term outside the context of the Mega Man X setting to refer to any robot that has the capability to think and make decisions for itself without human programming.