The Sega Mega Drive (メガドライブ), called the Sega Genesis in North America and Super Gam*Boy (수퍼겜보이) (later Super Aladdin Boy (수퍼알라딘 보이) in South Korea, is a cartridge-based video game console developed by Sega in 1988.
The Mega Drive is Sega's third home console, following the SG-1000 (including SG-1000 II) and the Sega Master System (Mark III). It was codenamed the Sega Mark V during development and is part of what is now known as the fourth generation of video game consoles.
The Mega Drive is Sega's most successful video game console, selling over 40 million units worldwide,including more than 20 million in the United States, over 9 million in Western Europe, 3.58 million in Japan, and 3 million in Brazil.
It has a software library consisting of more than one thousand games released for the system in total. As well as competing with Nintendo's Famicom (NES) and later Super Famicom (Super NES) for market control, Sega also found itself fighting against NEC's TurboGrafx-16 (PC Engine in Japan), SNK's Neo Geo, the Atari Jaguar and numerous home computers in one of the biggest "console wars" of all time.