Sega · Gen 4
Sega's 16-bit home console. Known as Genesis in North America. Featured the Motorola 68000 CPU and defined an era of gaming.
Hardware
Original Japanese Mega Drive.
North American version of the Mega Drive, branded as Genesis.
European Mega Drive.
JVC-manufactured combo unit integrating the Mega Drive and Mega CD into a single unit with enhanced audio output.
Revised, cost-reduced European Mega Drive.
Mega Drive and Mega-CD built into a semi-portable unit.
A budget revision of the Sega Genesis sold in North America after the system’s original run had ended. It was marketed and assembled by Majesco Entertainment under license from Sega, and it was designed and engineered by Sega. The console is a smaller, cost-reduced unit with reduced compatibility versus earlier Genesis models.
A combined Sega Genesis/Mega Drive and 32X prototype console intended to integrate the two add-ons into a single unit. It was shown in prototype form but never commercially released. The Neptune is best known from a small number of surviving prototype units and promotional material.