The second version of the Sega Master System. It had games like alex the kid, my hero, sonic and other great games. It also had a slot where you could put a thin card version of a game permenetly into it, so you could play that perticular game when no cartridge was inserted in the slot. It was proberly the least heard about system, at least from my perspective anyway.
guy 1: Hey I've got a sega mega drive.
guy 2: awesome, i've got a sega master system II.
guy1: ?
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