If you like cutting things in half with a beam sword, Mega Man Zero is the series for you! This game was developed exclusively for the Game Boy Advance and performed well enough to receive three annual sequels. It is the first major spin-off series in which some form of Mega Man is not the main protagonist, with that honor going to Zero. In addition to a variety of gameplay changes, the Mega Man Zero series is notable for including the deaths of both Mega Man X and Zero himself.