Mega Man X

Repliroids, which were developed to protect humans, began to attack humanity as being superior to humans. However, the doctor who developed the Repliroids foresaw the worst and left the Repliroid named Rockman X, which is constantly growing to protect humanity, as a last trump card...

Will X and Zero be able to defeat Sigma, the most powerful enemy who regards humans as Irregulars and wants to eliminate the human race?!