Test your willpower to stay on the side of good in this latest installment of the Mega Man Battle Network series. Enjoy great tournament style gameplay as Lan and Mega Man seek to rid the net of viruses. An innovative new "dark chip" is available if you want to use it to get out of a pinch. But beware! Overusing the dark chip will consume you with evil and you'll lose certain abilities. Battle Network 4 features two versions with distinct story lines and 6 unique enemy souls in each version. Not only that but your style, moves, and enemies are completely different!