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Sega Genesis

Sega Genesis / Mega Drive
North American logo
European/Australasian logo
The original Japanese Mega Drive
Model 2 Genesis w/ 6-button controller
Top: Original Japanese Mega Drive
Sega Genesis Model 2
Other variations are pictured under Variations below
Manufacturer Sega
Type Home video game console
Generation Fourth generation
Release date JP 19881029October 29, 1988
NA 19890814August 14, 1989
ROK 19900817August 17, 1990
PAL 19901130November 30, 1990
Retail availability 1988 - Present
Units sold 40 million (est.)
Media ROM cartridge
CPU Motorola 68000 @ 7.6 MHz
Zilog Z80 @ 3.58 MHz
Display Progressive: 320x224 (NTSC) or 320x240 (PAL) pixels, 512 color palette, 61 colors on-screen
Interlaced: 320x448 (NTSC) or 320x480 (PAL)
Sound Yamaha YM2612
Texas Instruments SN76489A
Online services Sega Meganet, Sega Channel, XBAND
Best-selling game Sonic the Hedgehog (pack-in), 15 million[1]
Sonic the Hedgehog 2, 6 million[2]
Master System through use of Power Base Converter peripheral
Predecessor Master System
Successor Sega Saturn

The Sega Genesis, known as the Mega Drive (Japanese: メガドライブ Hepburn: Mega Doraibu) in most regions outside North America, is a 16-bit home video game console which was developed and sold by Sega Enterprises, Ltd. The Genesis was Sega's third console and the successor to the Master System. Sega first released the console as the Mega Drive in Japan in 1988, followed by a North American debut under the Genesis moniker in 1989. In 1990, the console was distributed as the Mega Drive by Virgin Mastertronic in Europe, by Ozisoft in Australasia, and by Tec Toy in Brazil. In South Korea, the systems were distributed by Samsung and were known as the Super Gam*Boy (Hangul수퍼겜보이), and later the Super Aladdin Boy (Hangul수퍼알라딘보이).

Designed by an R&D team supervised by Hideki Sato and Masami Ishikawa, the Genesis hardware was adapted from Sega's System 16 arcade board, centered on a Motorola 68000 processor as a primary CPU and a Zilog Z80 as a secondary processor. The system supports a library of more than 900 games created both by Sega and a wide array of third-party publishers and delivered on ROM-based cartridges. It can also play Master System games when the separately sold Power Base Converter is installed. The Genesis has benefited from several peripherals and network services, as well as multiple first-party and third-party variations of the console that focus on extending its functionality.

In Japan, the Mega Drive did not fare well against its two main competitors, Nintendo's Super Famicom and NEC's PC Engine. However, it achieved considerable success in North America and in Europe, capturing the majority of the 16-bit market share in several territories, including the United States and the United Kingdom. Contributing to its success were its library of arcade game ports, the popularity of the Genesis-exclusive Sonic the Hedgehog series, several popular sports game franchises, and aggressive youth marketing that positioned the system as the cool console for adolescents. Though Sega dominated the 16-bit market in North America and Europe, the release of the Super Nintendo Entertainment System two years after the Genesis resulted in a fierce battle for market share in those territories that has often been termed as a "console war" by journalists and historians.[3][4] As this contest drew increasing attention to the video game industry among the general public, the Genesis and several of its highest-profile games attracted significant legal scrutiny on matters involving reverse engineering and video game violence. Controversy surrounding violent titles such as Night Trap and Mortal Kombat led Sega to create the Videogame Rating Council, a predecessor to the Entertainment Software Rating Board.

By the end of 1994, when a new generation of 32-bit consoles rendered the system technologically obsolete, an estimated 29 million Genesis units had been sold worldwide, and by the end of its life that number had increased to an estimated total of 40 million units. The console and its games continue to be popular among game fans, game music fans, collectors, and emulation enthusiasts. As of 2015, licensed third party re-releases of the console are still being produced by AtGames in North America, Blaze Europe, and Tec Toy in Brazil. Several indie game developers continue to produce games for it. Many games have been re-released in compilations for newer consoles and offered for download on various online services, such as Wii Virtual Console, Xbox Live Arcade, PlayStation Network, and Steam. The Genesis was succeeded by the Sega Saturn.


  • History 1
    • Development 1.1
    • Launch 1.2
    • North American sales and marketing 1.3
    • Sonic the Hedgehog 1.4
    • Trademark Security System and Sega v. Accolade 1.5
    • Videogame Rating Council and Congressional hearings on video game violence 1.6
    • 32-bit era and beyond 1.7
  • Technical specifications 2
    • Peripherals 2.1
    • Network services 2.2
  • Game library 3
    • Sega Virtua Processor 3.1
  • Add-ons 4
    • Sega CD 4.1
    • Sega 32X 4.2
  • Variations 5
    • First-party models 5.1
    • Third-party models 5.2
  • Legacy and revival 6
    • Re-releases and emulation 6.1
    • Later new releases 6.2
  • See also 7
  • References 8
  • External links 9



The original Mega Drive logo

In the early 1980s, Bally Manufacturing.[6][7] The company retained Sega's North American R&D operation, as well as its Japanese subsidiary, Sega of Japan. With its arcade business in decline, Gulf & Western executives turned to Sega of Japan's president, Hayao Nakayama, for advice on how to proceed. Nakayama advocated that the company leverage its hardware expertise gained through years working in the arcade industry to move into the home console market in Japan, which was in its infancy at the time.[8]

Nakayama received permission to proceed with this project, leading to the release of Sega's first home video game system, the SG-1000, in July 1983. The SG-1000 was not successful, and was replaced by the Sega Mark III within two years.[9] In the meantime, Gulf & Western began to divest itself of its non-core businesses after the death of company founder Charles Bluhdorn,[10] so Nakayama and former Sega CEO David Rosen arranged a management buyout of the Japanese subsidiary in 1984 with financial backing from CSK Corporation, a prominent Japanese software company. Nakayama was then installed as CEO of the new Sega Enterprises, Ltd.[11]

In 1986, Sega redesigned the Mark III for release in North America as the Sega Master System. This was followed by a European release the next year. Although the Master System was a success in Europe, and later also Brazil, it failed to ignite significant interest in the Japanese or North American markets, which, by the mid-to-late 1980s, were both dominated by Nintendo.[12][13][14] With Sega continuing to have difficulty penetrating the home market, Sega's console R&D team, led by Hideki Sato and Masami Ishikawa, began work on a successor to the Master System almost immediately after that console launched.[15][16]

In 1987, Sega faced another threat to its console business when Japanese computer giant NEC released the PC Engine amid great publicity.[17] To remain competitive against the two more established consumer electronics companies, Ishikawa and his team decided they needed to incorporate a 16-bit microprocessor into their new system to make an impact in the marketplace and once again turned to Sega's strengths in the arcade industry to adapt the successful Sega System 16 arcade board into a home console architecture.[16][18] The decision to use a Motorola 68000 as the system's main CPU was made late in development, while a Zilog Z80 was used as a secondary CPU to handle the sound due to fears that the load to the main CPU would be too great if it handled both the visuals and the audio.[16]

First announced in June 1988 in Beep!, a Japanese gaming magazine, the developing console was referred to as the "Mark V," but Sega management felt the need for a stronger name. After reviewing more than 300 proposals, the company settled on "Mega Drive." In North America, the name of the console was changed to "Genesis." The reason for this change is not known, but it may have been due to a trademark dispute.[18]


Sega released the Mega Drive in Japan on October 29, 1988, though the launch was overshadowed by Nintendo's release of Super Mario Bros. 3 a week earlier. Positive coverage from magazines Famitsu and Beep! helped to establish a following, but Sega only managed to ship 400,000 units in the first year. In order to increase sales, Sega released various peripherals and games, including an online banking system and answering machine called the Sega Mega Anser.[18] Nevertheless, the Mega Drive was unable to overtake the venerable Famicom[19] and remained a distant third in Japan behind Nintendo's Super Famicom and NEC's PC Engine throughout the 16-bit era.[20]

Sega announced a North American release date for the system on January 9, 1989.[21] At the time, Sega did not possess a North American sales and marketing organization and was distributing its Master System through Tonka. Dissatisfied with Tonka's performance, Sega looked for a new partner to market the Genesis in North America and offered the rights to Atari Corporation, which did not yet have a 16-bit system. David Rosen made the proposal to Atari CEO Jack Tramiel and the president of Atari's Entertainment Electronics Division, Michael Katz. Tramiel declined to acquire the new console, deeming it too expensive, and instead opted to focus on the Atari ST. Sega decided to launch the console through its own Sega of America subsidiary, which executed a limited launch on August 14, 1989, in New York City and Los Angeles. The Sega Genesis was released in the rest of North America later that year.[22]

The European version of the console was released on November 30, 1990. Building on the success of the Master System, the Mega Drive became the most popular console in Europe. Since the Mega Drive was already two years old at the time of its release in the region, more games were available at launch compared to the launches in other regions. The ports of arcade titles like Altered Beast, Golden Axe and Ghouls 'n Ghosts, available in stores at launch, provided a strong image of the console's power to deliver an arcade-like experience.[3] The release of the Mega Drive in Europe was handled by Virgin Mastertronic, which was later purchased by Sega in 1991 and became Sega of Europe.[23]

Other companies assisted in distributing the console to various countries worldwide. Ozisoft handled the Mega Drive's launch and marketing in Australia, as it had done before with the Master System.[24] In Brazil, the Mega Drive was released by Tec Toy in 1990,[25] only a year after the Brazilian release of the Master System. Tec Toy also produced games exclusively for the Brazilian market and began a network service for the system called Sega Meganet in 1995.[26] In India, Sega entered a distribution deal with Shaw Wallace in Spring 1995 in order to circumvent an 80% import tariff, with each unit selling for INR₹18,000.[27][28] Samsung handled sales and distribution of the console in Korea, where it was renamed the "Super Gam*Boy" and retained the Mega Drive logo alongside the Samsung name.[29] It was later renamed "Super Aladdin Boy."[30]

North American sales and marketing

For the North American market, former Atari Corporation Entertainment Electronics Division president and new Sega of America CEO Michael Katz instituted a two-part approach to build sales in the region. The first part involved a marketing campaign to challenge Nintendo head-on and emphasize the more arcade-like experience available on the Genesis,[31] summarized by slogans including "Genesis does what Nintendon't".[18] Since Nintendo owned the console rights to most arcade games of the time, the second part involved creating a library of instantly-recognizable titles which used the names and likenesses of celebrities and athletes such as Pat Riley Basketball, Arnold Palmer Tournament Golf, James 'Buster' Douglas Knockout Boxing, Joe Montana Football, Tommy Lasorda Baseball, Mario Lemieux Hockey, and Michael Jackson's Moonwalker.[17][32] Nonetheless, it had a hard time overcoming Nintendo's ubiquitous presence in consumers' homes.[33] Tasked by Nakayama to sell one million units within the first year, Katz and Sega of America managed to sell only 500,000 units.[18]

In mid-1990, Nakayama hired Tom Kalinske to replace Katz as CEO of Sega of America. Although Kalinske initially knew little about the video game market, he surrounded himself with industry-savvy advisors. A believer in the razor and blades business model, he developed a four-point plan: cut the price of the console, create a U.S.-based team to develop games targeted at the American market, continue and expand the aggressive advertising campaigns, and replace the bundled game Altered Beast with a new title, Sonic the Hedgehog.[33] The Japanese board of directors initially disapproved of the plan,[34] but all four points were approved by Nakayama, who told Kalinske, "I hired you to make the decisions for Europe and the Americas, so go ahead and do it."[18] Magazines praised Sonic as one of the greatest games yet made, and Sega's console finally took off as customers who had been waiting for the SNES decided to purchase a Genesis instead.[33] Nintendo's console debuted against an established competitor, while NEC's TurboGrafx-16 failed to gain traction, and NEC soon pulled out of the market.[35] In large part due to the popularity of this game, the Sega Genesis outsold the Super Nintendo in the United States nearly two to one during the 1991 holiday season. This success led to Sega having control of 65% of the 16-bit console market in January 1992, making it the first time Nintendo was not the console leader since December 1985.[36]

To compete with Nintendo Sega was more open to new types of games than its rival, but still tightly controlled the approval process for third-party games and charged high prices for cartridge manufacturing.[37] Technicians from American third-party video game publisher Electronic Arts (EA) reverse engineered the Genesis in 1989,[38] following nearly one year of negotiations with Sega in which EA requested a more liberal licensing agreement than was standard in the industry before releasing its games for the system.[39] The clean room reverse engineering of the Genesis was led by Steve Hayes and Jim Nitchals, lasting several months before EA secretly began development of Genesis games.[39] EA founder Trip Hawkins confronted Nakayama with this information one day prior to the 1990 Consumer Electronics Show (CES), noting that EA had the ability to run its own licensing program if Sega refused to meet its demands. Sega relented, and the next day EA's upcoming Genesis games were showcased at CES.[39] EA signed what Hawkins described as "a very unusual and much more enlightened license agreement" with Sega in June 1990: "Among other things, we had the right to make as many titles as we wanted. We could approve our own titles ... the royalty rates were a lot more reasonable. We also had more direct control over manufacturing."[38] After the deal was in place, EA chief creative officer Bing Gordon learned that "we hadn't figured out all the workarounds" and "Sega still had the ability to lock us out," noting "It just would have been a public relations fiasco."[39] EA released its first two Genesis games, Populous and Budokan: The Martial Spirit, within the month.[38] The first Genesis version of EA's John Madden Football arrived before the end of 1990,[38] and became what Gordon called a "killer app" for the system.[39] Taking advantage of the licensing agreement, Gordon and EA's vice president of marketing services Nancy Fong created a visual identifier for EA's Genesis cartridges: A yellow stripe on their left side added during manufacturing.[39]

Sega was able to outsell Nintendo four Christmas seasons in a row[40] due to the Genesis' head start, a lower price point, and a larger library of games when compared to the SNES at its release.[41] Sega had ten games for every game on Super NES, and while the Super NES had an exclusive version of Final Fight, one of Sega's internal development teams created Streets of Rage, which had bigger levels, tougher enemies, and a well-regarded soundtrack.[41] ASCII Entertainment reported in spring 1993 that Genesis had 250 titles versus 75 for Super Nintendo, but limited shelf space meant that stores typically offered 100 Genesis and 50 Super Nintendo titles. The NES was still the leader, with 300 titles and 100 on shelves.[42]

Sega's advertising positioned the Genesis as the cooler console,[41] and as its advertising evolved, the company coined the term "blast processing" (the origin of which is an obscure programming trick on the console's graphics hardware) to suggest that the processing capabilities of the Genesis were far greater than those of the SNES.[43][44] A Sony focus group found that teenage boys would not admit to owning a Super NES rather than a Genesis.[45] Even with the Genesis often outselling the Super NES at a ratio of 2:1,[46] Nintendo and Sega both focused heavily on impression management of the market, even going to the point of deception, with Nintendo claiming they had sold more consoles in 1991 than they actually had, and forecasting they would sell 6 million consoles by the end of 1992, while their actual U.S. install base at the end of 1992 was only just more than 4 million units.[47] Due to these tactics, it was difficult to ascertain a clear leader in market share for several years at a time, with Nintendo's dollar share of the U.S. 16-bit market dipping down from 60% at the end of 1992 to 37% at the end of 1993,[48] Sega claiming 55% of all 16-bit hardware sales during 1994,[49] and Donkey Kong Country helping the Super NES to outsell the Genesis from 1995 through 1997.[40][50][51][52][53] According to a 2004 study of NPD sales data, the Sega Genesis was able to maintain its lead over the Super NES in the American 16-bit console market.[54]

Sonic the Hedgehog

While Sega was seeking a flagship series to compete with Nintendo's Mario series along with a character to serve as a company mascot, several character designs were submitted by its Sega AM8 research and development department. Many results came forth from their experiments with character design, including an armadillo (who later developed into Mighty the Armadillo), a dog, a Theodore Roosevelt look-alike in pajamas (who would later be the basis of Dr. Robotnik/Eggman's design), and a rabbit (who would use its extendible ears to collect objects, an aspect later incorporated in Ristar).[1][55] Eventually, Naoto Ōshima's spiky teal hedgehog, initially codenamed "Mr. Needlemouse", was chosen as the new mascot.[44] The origins of Sonic can be traced farther back to a tech demo created by Yuji Naka, who had developed an algorithm that allowed a sprite to move smoothly on a curve by determining its position with a dot matrix. Naka's original prototype was a platform game that involved a fast-moving character rolling in a ball through a long winding tube, and this concept was subsequently fleshed out with Oshima's character design and levels conceived by designer Hirokazu Yasuhara.[56]

Sonic's blue pigmentation was chosen to match Sega's cobalt blue logo, and his shoes were a concept evolved from a design inspired by Michael Jackson's boots with the addition of the color red, which was inspired by both Santa Claus and the contrast of those colors on Jackson's 1987 album Bad; his personality was based on Bill Clinton's "can do" attitude.[1][57][58][59] A group of fifteen people started working on the first Sonic the Hedgehog game, and renamed themselves Sonic Team.[60]

Although Katz and Sega of America's marketing experts disliked the idea of Sonic, certain that it would not catch on with most American kids,[17][61] Kalinske's strategy to place Sonic the Hedgehog as the pack-in title paid off.[3][62] Featuring speedy gameplay, Sonic the Hedgehog greatly increased the popularity of the Sega Genesis in North America.[44] Bundling Sonic the Hedgehog with the Sega Genesis is credited with helping Sega gain 65% of the market share against Nintendo.[1]

Trademark Security System and Sega v. Accolade

After the release of the Sega Genesis in 1989, video game publisher [68]

An edition of the original model of Genesis, known as the Genesis III, was the model at the center of Sega v. Accolade for its incorporation of the Trademark Security System (TMSS)

As a result of piracy from foreign countries and unlicensed development issues, Sega incorporated a technical protection mechanism into a new edition of the Genesis released in 1990, referred to as the Genesis III. This new variation of the Genesis included a code known as the Trademark Security System (TMSS), which, when a game cartridge was inserted into the console, would check for the presence of the [68] Accolade learned of this development at the Winter Consumer Electronics Show in January 1991, where Sega showed the new Genesis III and demonstrated it screening and rejecting an Ishido game cartridge.[65] With more games planned for the following year, Accolade successfully identified the TMSS file. They later added this file to the games HardBall!, Star Control, Mike Ditka Power Football, and Turrican.[65]

In response to the creation of these unlicensed games, Sega filed suit against Accolade in the United States District Court for the Northern District of California, on charges of trademark infringement, unfair competition, and copyright infringement. In response, Accolade filed a counterclaim for falsifying the source of its games by displaying the Sega trademark when the game was powered up.[67][69] Although the district court initially ruled for Sega and issued an injunction preventing Accolade from continuing to reverse engineer the Genesis, Accolade appealed the verdict to the United States Court of Appeals for the Ninth Circuit.[70]

As a result of the appeal, the Ninth Circuit overturned the district court's verdict and ruled that Accolade's decompilation of the Sega software constituted fair use.[71] The court's written opinion followed on October 20, 1992, and noted that the use of the software was non-exploitative, although commercial.[64][72] Further, the court found that the trademark infringement, being required by the TMSS for a Genesis game to run on the system, had been inadvertently triggered by a fair use act and the fault of Sega for having caused false labeling.[64] Ultimately, Sega and Accolade settled the case on April 30, 1993. As a part of this settlement, Accolade became an official licensee of Sega, and later developed and released Barkley Shut Up and Jam! while under license.[73] The terms of the licensing, including whether or not any special arrangements or discounts were made to Accolade, were not released to the public.[74] The financial terms of the settlement were also not disclosed, although both companies agreed to pay their own legal costs.[75]

Videogame Rating Council and Congressional hearings on video game violence

VRC MA-13 rating, as applied to Mortal Kombat for the Genesis

In 1993, American media began to focus on the mature content of some video games, with games like Night Trap for the Sega CD, an add-on for the Genesis, receiving unprecedented scrutiny. Issues about Night Trap were also brought up in the United Kingdom, with former Sega of Europe development director Mike Brogan noting that "Night Trap got Sega an awful lot of publicity ... it was also cited in UK Parliament for being classified as "15" due to its use of real actors.[76] This came at a time when Sega was capitalizing on its image as an edgy company with attitude, and this only served to reinforce that image."[19] The most controversial title of the year by far was Midway's Mortal Kombat, ported to the Genesis and SNES by Acclaim. In response to public outcry over the game's graphic violence, Nintendo decided to replace the blood in the game with "sweat" and the arcade's gruesome "fatalities" with less violent finishing moves.[77] Sega took a different approach, instituting America's first video game ratings system, the Videogame Rating Council (VRC), for all of its current systems. Ratings ranged from the family friendly GA rating to the more mature rating of MA-13, and the adults-only rating of MA-17.[77] With the rating system in place, Sega released its version of Mortal Kombat, appearing to have removed all of the blood and sweat effects and toning down the finishing moves even more than in the SNES version. However, all of the arcade's blood and uncensored finishing moves could be enabled by entering a "Blood Code". This technicality allowed Sega to release the game with a relatively low MA-13 rating.[78] Meanwhile, the tamer SNES version shipped without a rating at all.[78]

The Genesis version of Mortal Kombat was well received by gaming press, as well as fans, outselling the SNES version three- or four-to-one,[77][79][80] while Nintendo was criticized for censoring the SNES version of the game.[78] Executive vice president of Nintendo of America Howard Lincoln was quick to point out at the hearings that Night Trap had no such rating, saying to Senator Joe Lieberman:

Furthermore, I can't let you sit here and buy this nonsense that this Sega Night Trap game was somehow only meant for adults. The fact of the matter is this is a copy of the packaging. There was no rating on this game at all when the game was introduced. Small children bought this at Toys "R" Us, and he knows that as well as I do. When they started getting heat about this game, then they adopted the rating system and put ratings on it.[77]

In response, Sega of America vice president Bill White showed a videotape of violent video games on the SNES and stressed the importance of rating video games. At the end of the hearing, Lieberman called for another hearing in February 1994 to check on progress toward a rating system for video game violence.[77]

As a result of the Congressional hearings, Night Trap started to generate more sales and released ports to the

  • Mega Drive at the Wayback Machine (archived January 9, 2007) at Sega Archives (official website by Sega of Japan) (in Japanese)

External links

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See also

In 2009, Chinese company AtGames produced a new Sega Genesis/Mega Drive-compatible console, the Firecore.[139] It features a top-loading cartridge slot and includes two controllers similar to the six-button controller for the original Genesis. The console has 15 games built-in and is region-free, allowing cartridge games to run regardless of their region of origin.[164] AtGames also produces a handheld version of the console.[165] Both machines have been released in Europe by distributing company Blaze Europe.[164]

In Brazil the Mega Drive never ceased production, though Tec Toy's current models emulate the original hardware. On December 5, 2007, Tec Toy released a portable version of Mega Drive with twenty built-in games.[162] Another version of the console called "Mega Drive Guitar Idol" comes with two six-button joypads and a guitar controller with five fret buttons. The Guitar Idol game contains a mix of Brazilian and international songs. The console has 87 built-in games, including some new ones from Electronic Arts: FIFA 2008, Need for Speed Pro Street, The Sims 2, and Sim City.[163]

On May 22, 2006, North American company Super Fighter Team released Beggar Prince, a game translated from a 1996 Chinese original.[156] It was released worldwide and was the first commercial Genesis game release in North America since 1998.[157] Super Fighter Team would later go on to release two more games for the system, Legend of Wukong and Star Odyssey.[157] In December 2010, WaterMelon, an American company, released Pier Solar and the Great Architects, the first commercial role-playing video game specifically developed for the console since 1996,[158] and also the biggest 16-bit game ever produced at 64Mb.[159] Pier Solar is also the only cartridge-based game which can optionally use the Sega CD to play a special enhanced soundtrack and sound effects disc.[160] In 2013, independent programmer Future Driver, inspired by the Disney film Wreck-It Ralph, developed Fix-It Felix Jr. for the Genesis.[161]

Later new releases

During his keynote speech at the 2006 Game Developers Conference, Nintendo president Satoru Iwata announced that Sega was going to make a number of Genesis/Mega Drive titles available to download on the Wii's Virtual Console.[152] These games are now available along with other systems' titles under the Wii's Virtual Console.[152] There are also select Sega Genesis titles available on the Xbox 360 through Xbox Live Arcade, such as Sonic the Hedgehog and Sonic 2,[153] as well as games available via the PlayStation Network[154] and Steam.[155]

A number of Genesis and Mega Drive emulators have been produced, including GenEM, KGen, Genecyst, VGen, St0rm,[146] and Gens.[147] The GameTap subscription gaming service included a Sega Genesis emulator and had several dozen licensed Genesis games in its catalog.[148] The Console Classix subscription gaming service also includes an emulator and has several hundred Sega Genesis games in its catalog.[149] In addition to emulation, a number of Sega Genesis games have been released on compilation discs for other video game consoles. These include Sonic Mega Collection and Sonic Gems Collection for PS2, Xbox, and Nintendo GameCube; Sega Genesis Collection for PS2 and PSP, and most recently Sonic's Ultimate Genesis Collection (known as the Sega Mega Drive Ultimate Collection in PAL territories) for PlayStation 3 and Xbox 360.[150][151]

Re-releases and emulation

The Sega Genesis, or Mega Drive, has often been considered among the best video game consoles ever produced. In 2009, IGN named the Sega Genesis the fifth best video game console, citing its edge in sports games and better home version of Mortal Kombat, and lauding "what some consider to be the greatest controller ever created: the six button."[141] In 2007, GameTrailers named the Sega Genesis as the sixth best console of all time in their list of top ten consoles that "left their mark on the history of gaming," noting its great games and solid controller, and writing of the "glory days" of Sonic the Hedgehog.[142] In January 2008, technology columnist Don Reisinger proclaimed that the Sega Genesis "created the industry's best console war to date," citing Sonic the Hedgehog, superior sports games, and backwards compatibility with the Sega Master System.[143] GamingExcellence also gave the Sega Genesis sixth place in 2008, declaring "one can truly see the Genesis for the gaming milestone it was."[144] At the same time, GameDaily rated it ninth of ten for its memorable games.[145] Of the console, Retro Gamer stated, "It was a system where the allure was born not only of the hardware and games, but the magazines, playground arguments, climate, and politics of the time."[18]

Legacy and revival

After the Genesis was discontinued, Majesco Entertainment released the Genesis 3 as a budget version of the console in 1998.[138] In 2009, AtGames began producing two new variations: the Firecore, which can play original Genesis cartridges as well as preloaded games, and a handheld console preloaded with 20 Genesis games.[139] Numerous companies, including Radica Games, have also released various compilations of Genesis and Mega Drive games in "plug-and-play" packages resembling the system's controller.[140]

Working with Sega of Japan, JVC released the Wondermega on April 1, 1992, in Japan. The system was later redesigned by JVC and released as the X'Eye in North America in September 1994. Designed by JVC to be a Genesis and Sega CD combination with high quality audio, the Wondermega's high price ($500 at launch[135]) kept it out of the hands of average consumers.[136] The same was true of the Pioneer LaserActive, which requires an add-on known as the Mega-LD pack, developed by Sega, in order to play Genesis and Sega CD games. Though the LaserActive was lined up to compete with the 3DO Interactive Multiplayer, the combined price of the system and the Mega-LD pack made it a prohibitively expensive option for Sega players.[137] Aiwa also released the CSD-GM1, a combination Genesis/Sega CD unit built into a boombox. Several companies added the Mega Drive to personal computers, mimicking the design of Sega's TeraDrive; these include the MSX models AX-330 and AX-990, distributed in Kuwait and Yemen, and the Amstrad Mega PC, distributed in Europe and Australia.[18]

Wondermega 2
Amstrad Mega PC
JVC Wondermega
JVC Wondermega 2
Amstrad Mega PC
Majesco's Sega Genesis 3
AtGames's Sega Firecore
Pioneer LaserActive
Sega Genesis 3
Pioneer LaserActive

Third-party models

Exclusive to the Japanese market was the TeraDrive, a Mega Drive combined with a computer. Sega also produced three arcade system boards based on the Mega Drive: the System C-2, the MegaTech, and the MegaPlay, which support approximately 80 games combined.[18]

Late in the 16-bit era, Sega released a handheld version of the console called the Sega Nomad. Its design was based on the Mega Jet, a Mega Drive portable unit featured on airplane flights in Japan. As the only successor to the Game Gear, the Nomad operates on 6 AA batteries, displaying its graphics on a 3.25-inch (8.25-mm) LCD screen. The Nomad supports the entire Genesis library, but cannot be used with the Sega 32X, the Sega CD, or the Power Base Converter.[134]

Sega also released a combined, semi-portable Genesis/Sega CD unit called the Sega Genesis CDX (Sega Multi-Mega Europe). This unit retailed at $399.95 in the US[130] (roughly $100 more than the individual Genesis and Sega CD units put together, since the Sega CD had dropped its price to $229 half a year before[131]), and was bundled with Sonic the Hedgehog CD, Sega Classics Arcade Collection, and the Sega CD version of Ecco the Dolphin.[132] It is incompatible with some games and cannot work with the Sega 32X due to overheating and electrical shock issues. The CDX features a small LCD screen that, when the unit is used to play audio CDs, displays the current track being played.[133] With this feature and the system's lightweight build (weighing two pounds), Sega marketed it in part as a portable CD player.[130]

In 1993, Sega introduced a smaller, lighter version of the console,[96] naming it the Genesis II in North America and the Mega Drive II everywhere else. This version omits the headphone jack in the front, replaces the A/V-Out connector with a smaller version that supports stereo sound, and provides a simpler, less expensive mainboard that requires less power.[99]

Genesis II
Sega CDX
Sega Genesis II
Sega CDX
Sega Genesis Nomad
Sega TeraDrive
Sega Nomad
Sega TeraDrive

First-party models

More than a dozen licensed variations of the Sega Genesis/Mega Drive have been released.[129] In addition to models made by Sega, several alternate models were made by other companies, such as Majesco, AtGames, JVC, Pioneer Corporation, Amstrad, and Aiwa. A number of bootleg clones were also created during its lifespan.[18]


The 32X was released in November 1994, in time for the holiday season. Demand among retailers was high, and Sega could not keep up orders for the system.[125] More than 1,000,000 orders had been placed for 32X units, but Sega had only managed to ship 600,000 units by January 1995.[115] Launching at about the same price as a Genesis console, the price of the 32X was less than half of what the Saturn's price would be at launch.[122] Notwithstanding the lower priced console's positioning as an inexpensive entry into 32-bit gaming, Sega had a difficult time convincing third-party developers to create games for the new system. After an early run on the peripheral, news soon spread to the public of the upcoming release of the Sega Saturn, which would not support the 32X's games. The Saturn was released early on May 11, 1995,[127] four months earlier than its originally intended release date of September 2, 1995.[128] The Saturn, in turn, caused developers to further shy away from the console and created doubt about the library for the 32X, even with Sega's assurances that there would be a large number of games developed for the system. In early 1996, Sega finally conceded that they had promised too much out of the 32X and decided to stop producing the system in order to focus on the Saturn.[115] Prices for the 32X dropped to $99 and ultimately cleared out of stores at $19.95.[125]

Although the new unit was a stronger console than originally proposed, it was not compatible with Saturn games.[125] Before the 32X could be launched, the release date of the Saturn was announced for November 1994 in Japan, coinciding with the 32X's target launch date in North America. Sega of America now was faced with trying to market the 32X with the Saturn's Japan release occurring simultaneously. Their answer was to call the 32X a "transitional device" between the Genesis and the Saturn.[123] This was justified by Sega's statement that both platforms would run at the same time, and that the 32X would be aimed at players who could not afford the more expensive Saturn.[115]

At the Winter Consumer Electronics Show in January 1994, Sega of America research and development head Joe Miller took a phone call from Nakayama, in which Nakayama stressed the importance of coming up with a quick response to the Atari Jaguar. One potential idea for this came from a concept from Sega of Japan, later known as "Project Jupiter," an entirely new independent console.[123] Project Jupiter was initially slated to be a new version of the Genesis, with an upgraded color palette and a lower cost than the upcoming Saturn, as well as with some limited 3D capabilities thanks to integration of ideas from the development of the Sega Virtua Processor chip. Miller suggested an alternative strategy, citing concerns with releasing a new console with no previous design specifications within six to nine months.[124] At the suggestion from Miller and his team, Sega designed the 32X as a peripheral for the existing Genesis, expanding its power with two 32-bit SuperH-2 processors.[125] The SH-2 had been developed in 1993 as a joint venture between Sega and Japanese electronics company Hitachi.[126] At the end of the Consumer Electronics show, with the basic design of the 32X in place, Sega of Japan invited Sega of America to assist in development of the new add-on.[124]

With the release of the Sega Saturn slated for 1995, Sega began to develop a stop-gap solution that would bridge the gap between the Genesis and the Saturn, and would serve as a less expensive entry into the 32-bit era.[122]

Sega 32X

The Mega-CD sold only 100,000 units during its first year in Japan, falling well below expectations. While many consumers blamed the add-on's high launch price, it also suffered from a tiny software library, with only two titles being available at launch. This was due in part to the long delay before Sega made its software development kit available to third-party developers.[119] Sales of the add-on were more successful in North America and Europe, though the novelty of FMV and CD-enhanced games quickly wore off as many of the system's later games were met with lukewarm or negative reviews. Finally, in 1995, Sega announced a shift in focus to its new console, the Saturn, and discontinued all advertising for Genesis hardware, including the Sega CD. The add-on sold 2.7 million units by the end of 1994.[82]

Shortly after its launch in North America, Sega began shipping the Sega CD with the pack-in game Sewer Shark, a full motion video (FMV) game developed by Digital Pictures, a company that became an important partner for Sega.[4] Touting the benefits of the CD's comparatively vast storage space, Sega and its third-party developers produced a number of games for the add-on that include digital video in their gameplay or as bonus content, as well as rereleasing several cartridge-based games with high-fidelity audio tracks.[114][117] In 1993, Sega released the Sega CD 2, a smaller and lighter version of the add-on designed for the Genesis II, at a reduced price compared to the original.[114] A limited number of games were also later developed that utilize both the Sega CD and the Sega 32X add-ons.[121]

In addition to greatly expanding the potential size of its games, this add-on unit also upgraded the graphics and sound capabilities of the console by adding a second, more powerful processor, more system memory, and hardware-based scaling and rotation similar to that found in Sega's arcade games.[4][120] It also provided battery-backed storage RAM to allow games to save high scores, configuration data, and game progress;[117] an additional data storage cartridge was sold separately.

By 1991, compact discs had gained in popularity as a data storage device for music and software. PCs and video game companies had started to make use of this technology. NEC had been the first to include CD technology in a game console with the release of the TurboGrafx-CD add-on, and Nintendo was making plans to develop its own CD peripheral as well. Seeing the opportunity to gain an advantage over its rivals, Sega partnered with JVC to develop a CD-ROM add-on for the Genesis.[4][117][118] Sega launched the Mega-CD in Japan[4] on December 1, 1991, initially retailing at JP¥49,800.[119] The CD add-on was launched in North America on October 15, 1992, as the Sega CD, with a retail price of US$299;[4] it was released in Europe as the Mega-CD in 1993.[119]

Sega CD

In addition to accessories such as the Power Base Converter, the Sega Genesis also 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 peripheral that can play its own library of games in CD-ROM format.[114] The second is the Sega 32X, a 32-bit peripheral which utilizes ROM cartridges as a format and serves as a pass-through for Genesis games.[115] Sega also produced a custom power strip to fit the peripherals' large AC adapters.[116] Both add-ons were officially discontinued in 1996.[51][114][115]

Genesis model 2 with a Sega CD 2 and 32X add-ons attached


As these enhancements became more commonplace on the SNES, the stock of existing Genesis games began to look outdated in comparison. Sega began work on an enhancement chip to compete with the Super FX, resulting in the Sega Virtua Processor. This chip enables the Genesis to render polygons in real time and provides an "Axis Transformation" unit that handles scaling and rotation. Virtua Racing, the only game released with this chip, runs at a significantly higher and more stable frame rate than similar games on the SNES. The chip was expensive to produce, and increased the cost of the games that used it. At US$100, Virtua Racing is the most expensive Genesis cartridge ever produced. Two other games, Virtua Fighter and Daytona USA, were planned for the SVP chip, but were instead moved into the Saturn's launch line-up.[111] There were also plans to sell the SVP chip as a separate upgrade module for the Genesis,[112][113] but this module was never released.

In order to produce more visually appealing graphics, companies began adding special processing chips to their game cartridges to effectively increase the console's capabilities. On the SNES, these are several DSP chips and RISC processors, which allow the console to produce faster and more accurate 3D and pseudo-3D graphics. In particular, the Super FX chip was designed to offload complex rendering tasks from the main CPU, enabling it to produce visual effects that the console cannot produce on its own. The chip was first used in Star Fox, which renders 3D polygons in real time, and Super Mario World 2: Yoshi's Island demonstrated the chip's ability to rotate, scale, and stretch individual sprites and manipulate large areas of the screen.[111]

The graphics produced by the Sega Virtua Processor are comparable to those of Nintendo's Super FX chip.[111]

Sega Virtua Processor

The Genesis library was initially modest, but eventually grew to contain games to appeal to all types of players. The initial pack-in title was Altered Beast, which was later replaced with Sonic the Hedgehog in 1991.[18] Top sellers included Sonic the Hedgehog, its sequel Sonic the Hedgehog 2, and Disney's Aladdin.[110] During development for the console, Sega of Japan focused on developing action games, while Sega of America was tasked with developing sports games. A large part of the appeal of the Genesis library during the console's lifetime was the arcade-based experience of its games, as well as more difficult entries such as Ecco the Dolphin, and sports games such as Joe Montana Football.[18] Compared to its competition, Sega advertised to an older audience by hosting more mature games, including the uncensored version of Mortal Kombat.[18]

A typical in-game screen shot of Sonic the Hedgehog, taken from its first level, Green Hill Zone

Game library

In an effort to compete with Sega, third-party developer Catapult Entertainment created the XBAND, a peripheral which allowed Genesis players to engage in online competitive gaming. Utilizing telephone services to share data, XBAND was initially offered in five U.S. cities in November 1994. The following year, the service was extended to the SNES, and Catapult teamed up with Blockbuster Video to market the service, but as interest in the service waned, XBAND was discontinued in April 1997.[109]

In 1994, Sega started the Sega Channel, a game distribution system utilizing cable television services Time Warner Cable and TCI. Using a special peripheral, Genesis players could download a title from a library of fifty each month, as well as demos for upcoming games. Games were downloaded to the console's internal memory and were deleted when the console was powered off. The Sega Channel reached 250,000 subscribers at its peak and ran until July 31, 1998, well past the release of the Sega Saturn.[108]

In its first foray into online gaming, Sega created Sega Meganet, which debuted in Japan on November 3, 1990. Operating through a cartridge and a peripheral called the "Mega Modem," this system allowed Mega Drive players to play seventeen games online. A North American version of this system, dubbed "Tele-Genesis," was announced but never released.[108] Another phone-based system, the Mega Anser, turned the Japanese Mega Drive into an online banking terminal.[18]

Sega Mega Modem peripheral, which allowed access to the Sega Meganet service

Network services

Both EA and Sega released multitaps for the system to allow more than the standard two players to play at once. Initially, EA's version, the 4 Way Play, and Sega's adapter, the Team Player, only supported each publisher's own titles. In response to numerous complaints about this, Sega publicly stated that "We have been working hard to resolve this problem since we learned of it" and that a new Team Player which would work with all multitap games for the console would be released shortly.[105] Later games were created to work on both the 4 Way Play and Team Player.[100] Codemasters also developed the J-Cart system, providing two extra ports on the cartridge itself, although the technology came late in the console's life and is only featured on a few games.[106] Sega planned to release a steering wheel peripheral for the system in 1994, and the Genesis version of Virtua Racing was even advertised as being "steering wheel compatible," but the peripheral was cancelled.[107]

In November 1993, Sega released the Sega Activator, an octagonal device that lies flat on the floor and translates the player's physical movements into game inputs.[100][102] Several high-profile games, including Mortal Kombat and Street Fighter II: Special Champion Edition, were adapted to support the peripheral. The device was a commercial failure, due mainly to its inaccuracy and its high price point.[100][103] IGN editor Craig Harris ranked the Sega Activator the third worst video game controller ever made.[104]

Sega Power Base Converter on a model 1 Genesis

A number of other peripherals for the console were released to add extra functionality. The Menacer is a wireless, infrared light gun peripheral used with compatible games.[101] Other third parties also created light gun peripherals for the Genesis, such as the American Laser Games Pistol and the Konami Justifier. Released for art creation software, the Sega Mega Mouse features three buttons and is only compatible with a few games, such as Eye of the Beholder. A foam-covered bat called the BatterUP and the TeeVGolf golf club were released for both the Genesis and SNES.[100]

The Genesis is also backwards compatible with the Master System. The first peripheral released for the system, the Power Base Converter, allows Master System games to be played on the console.[101] A second model, the Master System Converter 2, was released only in Europe for use with the Mega Drive II.[100]

The standard Genesis controller features a rounded shape, a directional pad, three main buttons, and a "start" button. Sega later released a six-button version in 1993. This pad is slightly smaller and features three additional face buttons, similar to the design of buttons on some popular arcade fighting games such as Street Fighter II. In addition, Sega also released a wireless revision of the six-button controller, the Remote Arcade Pad.[100]

Sega Genesis six-button controller


The back of the model 1 console provides a radio frequency output port (designed for use with antenna and cable systems) and a specialized 8-pin DIN port, both of which provide video and audio output. Both of these outputs produce monophonic sound, while a headphone jack on the front of the console produces stereo sound.[97] On the model 2, the DIN port, radio frequency output port, and headphone jack are replaced by a 9-pin mini-DIN port on the back for composite video, RGB and stereo sound, as well as the standard RF switch.[98] Earlier model 1 consoles also have a 9-pin extension port, though this was removed in later production runs and is absent entirely in the model 2. An edge connector on the bottom-right of the console allows it to be connected to a peripheral.[99]

The system produces sound by way of a Yamaha YM2612 FM synthesizer and a Texas Instruments SN76489A PSG, the latter is integrated with the Video Display Processor (VDP). The Z80 processor was primarily used to directly control both sound chips, particularly later in the console's lifespan, producing stereo music and sound effects. Most revisions of the original system contain the YM2612 and a separate YM7101 VDP; these two chips were later integrated into a single custom chip (YM3438) for the model 2 and later revisions.[96]

The main microprocessor of the Genesis is a 16/32-bit Motorola 68000 CPU clocked at 7.6 MHz.[94] The console also includes a Zilog Z80 sub-processor, which was mainly used to control the sound hardware and also provides backwards compatibility with the Master System. The system contains 72kB of RAM, as well as 64 kB of video RAM, and can display up to 61 colors[95] at once from a palette of 512. The system's games are in ROM cartridge format and are inserted in the top.[96]

European Mega Drive mainboard

Technical specifications

Sega continued to sell the Genesis worldwide through 1997,[51][53] selling 20 million units in the United States through that time.[87] In 1998, Sega licensed the Genesis to Majesco in North America so that it could rerelease the console. Majesco began reselling millions of formerly unsold cartridges at a budget price, together with 150,000 units of the second model of the Genesis.[53] It later released the Sega Genesis 3,[88] projecting to sell 1.5 million units of the console by the end of 1998.[53] Final sales estimates for the Genesis stand at approximately 40 million units sold;[89][90] of these, approximately 3.58 million were sold in Japan,[91] 8 million in Europe,[92] and 3 million in Brazil.[93] While the system sold 9 million less units than the SNES overall, this gap was less than the 47 million unit gap that separated the sales of Sega's Master System and Nintendo's NES in the 8-bit era.[89]

By contrast, Nintendo concentrated on the 16-bit home console market, as well as its successful handheld, the Game Boy. As a result, Nintendo took in 42% of the video game market dollar share, without launching a 32-bit console to compete directly with the PlayStation or the Saturn.[83] The 1995 release of a Genesis-based handheld, the Sega Nomad, also suffered from a poorly timed launch near the release of Pokémon, a Game Boy game that would become very popular.[86]

Following the launch of the next-generation 32-bit Sony PlayStation and the Sega Saturn, sales of 16-bit hardware and software continued to account for 64% of the video game market in 1995.[83] However, Sega underestimated the continued popularity of the Genesis and did not have the inventory to meet demand for the product.[83][84] Sega was able to capture 43% of the dollar share of the U.S. video game market and sell more than 2 million Genesis units in 1995, while Genesis software such as Vectorman remained highly successful. Kalinske estimated that "we could have sold another 300,000 Genesis systems in the November/December timeframe."[84] Nakayama's decision to focus on the Saturn over the Genesis, based on the systems' relative performance in Japan, has been cited as the major contributing factor in this miscalculation.[83] Following tensions with Sega of Japan over its focus on the Saturn, Kalinske, who oversaw the rise of the Genesis in 1991, grew uninterested in the business and resigned in mid-1996.[85]

In order to extend the life of the Genesis, Sega released two add-ons to increase the capabilities of the system: a CD-based peripheral known as the Sega CD (Mega-CD outside North America), as well as a 32-bit peripheral known as the Sega 32X.[62] By the end of 1994, the Genesis had sold 29 million units worldwide, including 14 million in the United States, 3.5 million in Japan, 2.1 million in the United Kingdom, and 800,000 in Germany. Its add-ons were less successful, with the Sega CD selling 2.7 million units worldwide by this time and the 32X selling 665,000 units.[82]

32-bit era and beyond

[78] was released uncensored.Mortal Kombat II With this new rating system in place, Nintendo decided its censorship policies were no longer needed, and the SNES port of [77]

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