There are over 130 Mega Man titles, and many are essentially the same formula. That is: choose a level based on one of a number of boss enemies (usually themed, with a unique name); run and jump your way through a tortuous series of platforms and ladders to reach said boss; then whup its ass in a boss fight.
Mega Man 3 first came out on the Famicom in Japan in September 1990. Of the first three Mega Man games it is arguably the most polished. It is a tough game though. Like all Mega Man games.
In this one you’re up against Magnet Man, Hard Man, Top Man, Shadow Man, Spark Man, Snake Man, Gemini Man, Needle Man. You can guess what Spark Man does, but what does Needle Man do?! You’ll have to play the game to find out… 🙂
A playable dog character, called Rush, made his debut in this game. As did Mega Man‘s ‘slide’ move, which allows him to slide under low barriers and enemy attacks.
More: Mega Man 3 on Wikipedia