The fight for everlasting peace continues in Mega Man 4 for the NES. When a new scientist, Dr. Cossack, unleashes his own army of Robot Masters, Mega Man must once again spring into action. This installment introduces the powerful New Mega Buster, allowing Mega Man to charge his shots for increased damage. Face new challenges, acquire diverse weaponry, and uncover the truth behind Dr. Cossack's attack.