Development
In the early 1980s, Sega Enterprises, Inc. – then a subsidiary of Gulf+Western – was one of the top five arcade gamemanufacturers active in the United States, as company revenues

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The main microprocessor is a 16/32-bit Motorola 68000 CPU clocked at 7.6 MHz. An 8-bit Zilog Z80 processor controls the sound hardware and provides backward compatibility with the Master System. The Genesis has 64 kB of RAM, 64 kB of video RAMand 8

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The Genesis library was initially modest, but eventually grew to contain games to appeal to all types of players. The initial pack-in game was Altered Beast, which was later replaced with Sonic the Hedgehogin 1991. Top sellers included Sonic the Hedgehog, its

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More than a dozen licensed variations of the Genesis/Mega Drive have been released. In addition to models made by Sega, alternate models were made by other companies, such as

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Reviewing the Genesis in 1995, Game Players noted that its rivalry with the Super NES was skewed by genre, with the Genesis having superior sports games and the Super NES superior

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The Genesis has often ranked among the best video game consoles. In 2009, IGNnamed it the fifth best video game console, citing its edge in

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In addition to accessories such as the Power Base Converter, the Genesis supports two add-ons that each support their own game libraries. The first is the Sega CD (known as the Mega-CD in all regions except for North America), a compact disc-based

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