Sega released several variations of this console in Japan, the third of which, the Sega Mark III, was rebranded as the Master System and released worldwide in 1985.
Sega merilis beberapa ragam dari konsol ini di Jepang, ragam ketiga diantaranya, Sega Mark III, berganti merek menjadi Master System dan dirilis di seluruh dunia pada 1985.