SDIMk III Sega Mark III, 1987 Global Defense SDI SDI Also released in North America and Europe. PlatformSega Mark III Released in Japan24 October 1987 PublisherSega Product codeG-1338 Mediaphysical Other regions North America Global Defense March 1988, Sega, physical Europe Global Defense March 1988, Sega, physical Add to my collection Open in Tana