就是MD的忍龙，未发售，只有流出的ROM

引用:

原帖由 qazwsxqwer 于 2011-9-30 16:13 发表

求更详细说明

[edit] Ninja Gaiden (Beta) (Mega Drive/Genesis)
A Mega Drive/Genesis version of Ninja Gaiden'[5] was in development by Sega sometime in 1992. It was planned to be a belt scroll-style beat-'em-up similar to the arcade version of Ninja Gaiden, instead of following the side-scrolling platform game format from the NES trilogy. The plot would have involved Ryu traveling to the United States in order to track down a pair of sibling ninjas named Jin and Rika who have gone rogue by stealing the Secret Scrolls of the Huma (an alternate romanization of the name "Fūma"). The Mega Drive version is not a port of the arcade game, but some of the stages (such as a casino) and enemy characters (like the hockey mask-wearing punks) are similar,[6] though the play mechanics are very different.

The game was never released commercially, but a beta build was leaked through the internet as a ROM image. The beta features seven stages, including cut-scenes and bosses, but has several programming bugs such as odd moving controls, unfinished levels, and cut-scenes which are skipped before finishing. Although the opening and stage names are in Japanese, the rest of the cut-scenes were translated into English. The techniques available in the beta consists of a standard punch combo, a jump kick, a rolling move, and a special somersault kick.



MD忍龙就找到这些资料，其实SEGA的SMS和GG上都有忍龙的