You play as Zero again in this fourth installment of the Megaman Zero series, you will have to fight against hundreds of enemies in this platform game.The evil Dr. Weil wants to take over Neo Arcadia and only Zero and his friends can stop him leading the union between humans and reploids.As always, between missions you can configure your abilities (weapons, cyber-elfs, etc.) and talk to characters to learn different things.One of the new implementations to the series is that you can control the weather to overcome different obstacles.