The Master System is an 8-bit home video game console made and designed by Sega. It was a modified version of the Sega Mark III, which was the third version of the SG-1000 series of consoles. The Mark III was first released in Japan on October 20, 1985. The Master System was later introduced in North America in September 1986, followed by Europe in August 1987, South Korea in April 1989, and Brazil in September 1989. A Japanese version of the Master System was launched on October 23, 1987, and included a built-in FM audio chip, a rapid-fire switch, and a port for 3D glasses. In 1990, a cheaper version called the Master System II was released in North America, Australasia, and Europe.
The original Master System models used both cartridges and a credit card-sized format called Sega Cards. Accessories included a light gun and 3D glasses that worked with special games. The Master System II was redesigned to remove the card slot, making it a cartridge-only system. This version could not be used with the 3D glasses.
As a third-generation console, the Master System was released at the same time as the Nintendo Entertainment System (NES). It had fewer games and less popular titles compared to the NES, partly because Nintendo required games to be exclusive to its system. Although the Master System had better hardware, it could not take away Nintendo’s market share in Japan, North America, and most of Western Europe. However, it was more successful in some areas, such as the United Kingdom, Belgium, Spain, Brazil, South Korea, New Zealand, and Australia.
The Master System is estimated to have sold between 10 and 13 million units worldwide. In Brazil, Tectoy sold 8 million licensed versions of the Master System. Later reviews have praised its role in the development of the Sega Genesis and some well-received games in PAL regions. However, it is criticized for having fewer games in NTSC regions, which were dominated by the NES.
History
Sega released its first video game console, the SG-1000, in Japan on July 15, 1983, the same day its competitor Nintendo launched the Family Computer (Famicom). In 1984, Sega’s parent company, Gulf and Western Industries, sold off non-core businesses, including Sega. Sega president Hayao Nakayama became CEO. Nakayama and Sega co-founder David Rosen later arranged a management buyout with financial support from CSK Corporation, and CSK CEO Isao Okawa was named chairman.
On July 31, 1984, Sega released the SG-1000 II, an updated version of the SG-1000 with changes like detachable controllers. To compete with Nintendo, Sega released the Mark III, another revision of the SG-1000, in Japan on October 20, 1985, priced at ¥15,000. The Mark III was designed by the same team that worked on the SG-1000, including Hideki Sato and Masami Ishikawa, who later led development of the Mega Drive. Sato stated the console was redesigned because the SG-1000’s Texas Instruments TMS9918A graphics chip lacked the power for the games Sega wanted to create. The Mark III used a chip developed in-house, based on the unit in Sega’s System 2 arcade system board.
Although the Mark III had more powerful hardware than the Famicom, it was not successful at launch. Nintendo’s licensing rules limited third-party developers from publishing Famicom games on other consoles. Sega created its own games and secured rights to port games from others, but these games did not sell well.
Though the SG-1000 had not been released in the United States, Sega hoped its console business would succeed in North America. To achieve this, Sega of America was created in 1986 to manage the company’s consumer products in North America. Rosen and Nakayama hired Bruce Lowry, who was Nintendo of America’s vice president of sales. Lowry joined Sega because the company allowed him to start his office in San Francisco. He named his division “Sega of America” because he had worked for Nintendo of America and liked the word combination. Initially, Sega of America rebranded the Mark III as the Master System, similar to how Nintendo rebranded the Famicom as the Nintendo Entertainment System (NES). The name was chosen by throwing darts at a whiteboard of suggested names. Okawa approved the name, which referenced the competitive nature of the video game industry and martial arts, where only one competitor can be the “Master.” The Master System’s design aimed to appeal to Western tastes. Its North American packaging was white, different from the black NES packaging, with a grid design inspired by Apple computers.
The Master System was first shown in North America at the Summer Consumer Electronics Show (CES) in Chicago in June 1986. It launched in September 1986 at $200 (equivalent to $590 in 2025), sold with the “Power Base” console, a light gun, two controllers, and a multicart containing the games Hang-On and Safari Hunt. Around the same time, Nintendo exported the Famicom to the US as the NES, and both companies planned to spend $15 million in late 1986 to market their consoles. Sega aimed to sell 400,000 to 750,000 consoles in 1986. By the end of 1986, at least 125,000 Master System consoles were sold, more than the Atari 7800’s 100,000 but fewer than Nintendo’s 1.1 million. Other reports suggest over 250,000 units were sold by Christmas 1986.
Like in Japan, the Master System had a limited game library in North America. Nintendo’s licensing rules limited Sega to two third-party American publishers: Activision and Parker Brothers. Agreements with both ended in 1989. Sega claimed the Master System was the first console where the graphics on the box matched the game’s graphics and promoted the “arcade experience” in advertisements. However, Sega’s marketing team had only two members, giving it a disadvantage in advertising. In 1987, Sega partnered with astronaut Scott Carpenter to launch the “Sega Challenge,” a traveling program in recreational centers where children tested non-verbal skills. Out Run and Shooting Gallery were included in the challenge.
In 1987, amid weak US sales, Sega sold the Master System’s US distribution rights to toy company Tonka, which had no experience with electronic entertainment systems. Sega made the deal to use Tonka’s knowledge of the American toy market, as Nintendo had successfully marketed the NES as a toy. The announcement came shortly after the 1987 Summer CES. During this time, Sega of America shifted focus from marketing to customer service, and Lowry left the company. Tonka blocked localization of popular Japanese games and reduced purchases of EPROMs needed for game cartridges during a shortage. Tonka also became less willing to invest in video games after taking large loans to buy Kenner Toys in 1987, followed by poor holiday sales and financial losses.
On October 18, 1987, the Mark III was re-released as the Master System in Japan for ¥16,800, but sales remained poor. Neither model challenged Nintendo in Japan, and Sega captured only 10% of the Japanese console market, according to Sato.
The Master System launched in Europe in August 1987, distributed by Mastertronic in the UK, Master Games in France, and Ariolasoft in West Germany. Ariolasoft initially bought UK distribution rights but could not agree on pricing with Sega. Mastertronic signed a deal in 1987 to take over UK distribution and announced it at the 1987 Summer CES. The company planned to release 12 titles by autumn. Mastertronic advertised the Master System as “an arcade in the home” and launched it at £99 (equivalent to £290 in 2025). Retailers ordered many units, but Sega could not deliver until December 26, causing many to cancel their orders. Mastertronic and Master Games faced financial crises, and Ariolasoft refused to work with Sega again. Mastertronic had already sold a minority stake to the Virgin Group to enter the console business and later sold the rest to avoid bankruptcy. Virgin Mastertronic took over all European distribution in 1988.
Virgin Mastertronic focused on marketing the Master System with ports of Sega’s arcade games,
Technical specifications
The Master System uses an 8-bit Zilog Z80A central processing unit (CPU) that is designed to run at 4 MHz but actually operates at 3.58 MHz. It has 8 KB of read-only memory (ROM), 8 KB of random access memory (RAM), and 16 KB of video RAM (VRAM). Video output is sent through an RF switch, though some models also include an AV port for composite or RGB video. The system displays images at a resolution of 256 × 192 pixels and can show up to 32 colors from a total of 64 colors. The Video Display Processor (VDP), a graphics chip designed by Sega for the Mark III, handles these visuals. The Master System measures 365 mm × 170 mm × 70 mm (14.4 in × 6.7 in × 2.8 in), while the Mark III is smaller, measuring 318 mm × 145 mm × 52 mm (12.5 in × 5.7 in × 2.0 in). Both consoles have two game input slots: one for Mega Cartridges and one for Sega Cards, along with an expansion slot and two controller ports. Sound is produced by the Texas Instruments SN76489 PSG chip inside the VDP, which can generate three square wave channels and one noise channel. The Japanese version also includes the Yamaha YM2413 FM chip, which was an optional feature on the Mark III. With few exceptions, the Master System and Mark III share the same hardware. Games for the Master System can be played on the Sega Genesis using the Power Base Converter and on the Game Gear using the Master Gear Converter. Compared to the base NES, the Master System has four times as much system memory, eight times as much video memory, and a higher CPU clock rate.
Sega released several versions of the Master System. The Master System II, introduced in 1990, removed components like the Sega Card slot, reset button, power light, expansion port, and startup music and logo to reduce costs. In most regions, the Master System II lacked an A/V port, offering only RF output, but in France, the local version had only A/V output and no RF hardware. In Brazil, Tectoy released variations such as the Master System Super Compact, which uses wireless RF transmission, and the Master System Girl, a pink-colored model aimed at girls. The Master System 3 Collection, released in 2006, includes 120 built-in games. Handheld versions of the Master System were also produced by other companies, such as Coleco in 2006.
Accessories compatible with the Mark III and Master System include a controller with a D-pad and two buttons. Additional Mark III controllers, such as a paddle controller, were also available. A combination steering wheel and flight stick called the Handle Controller was released in 1989. The Sega Control Stick is an arcade-style joystick with buttons on the opposite side of the standard controller. The Sega Sports Pad, which uses a trackball and is compatible with three games, was not released in Europe. The Rapid Fire Unit, an expansion for the controller, allows automatic firing by holding a button and connects between the console and controller. The Light Phaser, a light gun peripheral based on a weapon from the anime Zillion, works with 13 games and was released only in the West.
The SegaScope 3-D, a pair of 3D glasses, was designed for games like Space Harrier 3-D. They use an active shutter system to create a 3D effect and connect to the Sega Card slot, making them incompatible with the Master System II due to the absence of a card slot. Eight games, including Zaxxon 3-D and OutRun 3-D, are compatible with the glasses. The Mark III has an optional RF transmitter accessory that allows wireless gameplay by broadcasting signals to a UHF television.
The Game Gear, developed under the name "Project Mercury" and based on Master System hardware, is a handheld game console. It was first released in Japan on October 6, 1990, in North America and Europe in 1991, and in Australia and New Zealand in 1992. It originally cost JP¥19,800 in Japan, $149.99 in North America, and £99.99 in the United Kingdom. The Game Gear was designed to compete with the Game Boy, which Nintendo released in 1989. The Game Gear shares hardware similarities with the Master System, allowing Master System games to be played on the Game Gear using the Master Gear Converter. Many of the Game Gear’s games are ports of Master System titles. Tectoy in Brazil often ported Master System games to the Game Gear because the Master System was more popular in the region.
Game library
Master System games were available in two formats: ROM cartridges and Sega Cards. Cartridges could store up to 4 Mbit (512 KB) of data, while Sega Cards held up to 256 Kbit (32 KB). Cartridges were labeled by their storage size: One Mega (1 Mbit), Two Mega (2 Mbit), or Four Mega (4 Mbit). Sega Cards were less expensive to make but had limited memory. Games like Spy vs. Spy and Super Tennis were released on cards, but they were later discontinued because of their small memory capacity. The number of games available varied by region: North America had about 100 games, Japan had fewer, and Europe had over 300 games, including 8-bit versions of Genesis titles and exclusive releases for PAL regions. The first Mark III-specific cartridge was Fantasy Zone, released on June 15, 1986. The last Mark III game was Bomber Raid, released on February 4, 1989, shortly after the Mega Drive launched. The final North American Master System game was Sonic the Hedgehog, released in October 1991. PAL region games continued to be released until the mid-1990s.
The Sega Mark III and Japanese Master System could play SC-3000/SG-1000 cartridges and Sega Card games without needing the Card Catcher peripheral. However, educational and programming cartridges for the SC-3000 required the SK-1100 keyboard, which worked with the Mark III. Mark III-specific games were initially sold as cards labeled "My Card Mark III" to distinguish them from SC-3000/SG-1000 games. These included Teddy Boy Blues and Hang-On, both released on October 20, 1985.
Among Master System games, Phantasy Star is considered a key role-playing game (RPG) and became a successful series. Alex Kidd, Sega’s main character at the time, appeared in games like Alex Kidd in Miracle World. Wonder Boy III: The Dragon’s Trap was notable for combining platform gameplay with RPG elements. Some Master System consoles had built-in games, such as Snail Maze, Hang-On / Safari Hunt, Alex Kidd in Miracle World, and Sonic the Hedgehog. Eight cartridges supported saving progress using battery-backup technology, including Penguin Land, Phantasy Star, Ys, and Miracle Warriors.
The PAL region library had more games than other regions, including 8-bit versions of Genesis titles like Streets of Rage, additional Sonic the Hedgehog games, and exclusive titles such as The Lucky Dime Caper Starring Donald Duck, Asterix, Ninja Gaiden, Master of Darkness, and Power Strike II. Retro Gamer’s Damien McFerran praised the PAL library for its variety of quality games, which were more diverse than the North American collection.
After the Master System was no longer sold in other markets, Tectoy in Brazil released additional games, including Street Fighter II: Champion Edition and Dynamite Headdy. Tectoy translated games for the Brazilian market and created localized versions, such as Geraldinho (based on Teddy Boy) and Monica's Gang (based on Wonder Boy). They also developed exclusive games like Férias Frustradas do Pica-Pau, inspired by the popular cartoon Woody Woodpecker (called Pica-Pau in Brazil).
Few third-party developers made games for the Master System due to Nintendo’s rules, which limited NES developers from releasing games on other platforms. Sega focused on porting arcade games instead of working with outside developers. According to Sega designer Mark Cerny, early Master System games were developed quickly, which affected their quality. Computer Gaming World compared new Sega games to "drops of water in the desert." The Master System had better hardware than the NES, allowing games like Alex Kidd in Miracle World to feature vibrant colors and detailed graphics. The Master System version of R-Type was praised for its visuals, which were similar to the TurboGrafx-16 port.
In 2005, Sega partnered with AtGames to release emulated Master System games in Taiwan, Hong Kong, and China. Some Master System games were later available for download on the Nintendo Wii Virtual Console, starting with Hokuto no Ken in Japan in 2008 and Wonder Boy in North America. Master System games were also offered through the GameTap online service.
Reception and legacy
The Master System is often called the longest-lasting gaming console in video game history by many publications. It earned this title from the Atari 2600. Sales of the Master System are estimated to have reached between 10 million and 13 million units, not counting later sales in Brazil. The console was more successful in Europe and Brazil than in Japan and North America. In 1989, the Master System was listed among the top 20 products in NPD Group’s Toy Retail Sales Tracking Service. However, by 1992, interest in the console had decreased, as noted by reviewers who gave it scores of 5, 4, 5, and 5 out of 10. They pointed out that the Genesis offered better value and fewer quality games for the Master System. By 1993, reviewers gave it lower scores of 2, 2, 3, and 3 out of 10, citing Sega’s reduced support for the console in North America and a lack of new games. In contrast, over 34 million NES units were sold in North America alone, selling nearly three times as many units as the Master System globally. Bill Pearse of Playthings stated that the NES had an advantage due to better software and more well-known characters. Sega later closed the gap with Nintendo in the next generation by releasing the Genesis, which sold 30.75 million units compared to the 49 million Super Nintendo Entertainment System units.
Later reviews of the Master System praised its role in helping develop the Sega Genesis but criticized its limited number of games. Dave Beuscher of AllGame wrote that the Master System struggled because of weak support from other companies and disappeared from the American market by 1992. Adam Buchanan of Retro Gamer noted that the PAL version of the Master System had a strong collection of games, including interesting ports and exclusive titles. Damien McFerran of Retro Gamer said the Master System was important to the success of the Genesis, explaining that it allowed Sega to test arcade-style games, create original ideas, and introduce a character like Alex Kidd, a monkey-boy mascot. In 2009, the Master System was ranked as the 20th best console of all time by IGN, behind the Atari 7800 (17th) and the NES (1st). IGN mentioned that the Master System’s limited and inconsistent NTSC game library was a major issue, as long delays between major releases made the console feel less appealing.