Alex Kidd in Shinobi World

Alex Kidd in Shinobi World is a side-scrolling action game produced by Sega that was originally released for the Master System in 1990 and later re-released for the Wii Virtual Console in 2009. Although developed in Japan, it was released exclusively for the overseas market (North America, Europe and Brazil), with the American version being produced in limited quantities. The game stars Alex Kidd in a parody version of Sega's ninja-themed action game Shinobi, where Alex Kidd fights against caricatures of many of the enemies from Shinobi. It was the final video game to star the Alex Kidd character.

Alex Kidd in Shinobi World's cartridge label is normally the regular red with black grid design, however a much rarer blue label version exists and is considered to be somewhat of a collector's item to Master System game collectors.