For most of it's life the Gen shipped with a 6 mane button (A,B,C,X,Y,Z) controller but they also had start and mode. Some game made use of mode,
http://www.sega-16.com/forum/archive/index.php/t-17829.html. Eventually it will probably be released on many different platforms after the fact. There last game, Pier solar was also developed for the Gen but is now available on Xbox 360, PS4, PC, Mac, Linux, Sega Dreamcast, Android, Ouya and Wii U. I assume this will be the same.
Pier solar received some mixed reviews, but was received by fans of old school RPG mostly positive.