Keith Courage in Alpha Zone is a science fantasy action platformer developed by Advance Communication Company and published by NEC for the TurboGrafx-16.  The game originally released in Japan as Mashin Eiyūden Wataru in 1988 for the PC Engine and was an adaptation of the anime television series of the same name, Spirit Hero Wataru.

The Japanese version of the game is a licensed title based on an anime series created by Sunrise and followed the storyline of the television series.  When NEC decided to release the game in North America the title was renamed to Keith Courage in Alpha Zone and a new plot was written for the port.  In the North American release of the game players take on the role of Keith Courage, a member of N.I.C.E., Nations for International Citizens of Earth, in a fight against the aliens of B.A.D., Beastly Alien Dudes, who are trying to take over Earth.

NEC released the TurboGrafx-16 in North America two weeks after Sega launched the Genesis and Sega quickly eclipsed NEC upon their debut.  Sega chose to bundle their system with the hit arcade title “Altered Beast” which placed pressure on NEC to do the same.   NEC made the decision to bundle “Keith Courage in Alpha Zones” with the TurboGrafx-16 however it failed to find the same success as Altered Beast did for Sega.  Even though the port of the game featured a new plot the game was ultimately designed with a Japanese audience in mind.  The game did not appeal to the North American market at the time unlike the well received Sega Genesis title that was catered for the western market.