We have Ninja games availables on Super Nintendo, Sega Genesis, Game Boy, NES

A ninja (or shinobi) was a covert agent or mercenary in feudal Japan. The functions of the ninja included espionage, sabotage, infiltration, assassination and guerrilla warfare. Their covert methods of waging irregular warfare were deemed 'dishonorable' and 'beneath' the samurai-caste, who observed strict rules about honor and combat.