Mega-Man 2

Mega-man 2 has many bright colors and has nine levels.  You choose which level you begin with.  You cannot fight the evil Dr. Wily until you have beaten the other eight 'mans' that Dr. Wily has created.  After you defeat each boss you receive a power-up to help you defeat a new boss.

This game is very tough and requires lots of concentration to beat this game.  This is a successful sequel to the original Mega-Man.  There is a more open world than Mario games and it allows for a changing story and a different feel to the game each time.