Mega Man 2 is the game that would make Mega Man popular, and it shows. Set a year after the first, Dr. Wily returns, and has made eight robot masters of his own, each designed to combat Mega Man. This game retains the first game's difficulty (especially when it come to Quick Man's stage, which is filled with lasers that can cause instant death), so for the American release, Capcom added an easier difficulty that makes things easier. Also, the game is the first to feature a passwords system that would be used for titles up to Mega Man 7, and the game introduces three Items, transports that would serve as the prototype to Rush, received by beating a certain boss, as well as E Tanks, which automatically refill Mega Man's health to 100% when used. This is a great example of how a sequel should improve over the original, and must be played.