Tecmo Cup Football Game is an unreleased Mega Drive game. In Japan where the game originated, it was called Captain Tsubasa and was based around the media franchise of the same name. As such, rather than being a straight soccer simulation, Tecmo Cup Football Game takes a more cinematic/RPG-esque approach to the sport, with the actual game being presented cinematicly and moves made by choosing from menus in a limited time.
This version was being programmed for the Sega Mega Drive in 1993; only Sega and Tecmo are listed as involved companies and the programming appears to be unique to this game. The game was not released in any region; the reason why is unknown. Because the westernized game is still similar to Captain Tsubasa in many ways, it is often pirated by Asian pirates as a genuine Captain Tsubasa game.