For someone encountering Kung Fu on the Nintendo Entertainment System for the first time, there is not much mystery about what the game expects. Thomas walks onto the first floor of a hostile building, men begin rushing toward him, and the player punches and kicks until the path is clear. At the end of the floor waits a stronger opponent. Defeat him, climb the stairs, and repeat the process until Thomas reaches Sylvia, his kidnapped girlfriend, at the top.
It is one of the simplest formulas in Nintendo’s early library, but Kung Fu occupies a much larger place in video game history than its five floors might suggest.
Before Double Dragon, Final Fight, and Streets of Rage turned the beat ’em up into one of the dominant arcade genres of the late 1980s and early 1990s, Irem had already created many of the ideas that would define it. Players moved horizontally through waves of attackers, managed enemies arriving from multiple directions, fought distinctive bosses, and gradually advanced toward a final confrontation. Guinness World Records has recognized Irem’s original arcade game as the first side-scrolling beat ’em up, and the surviving arcade machine in the collection of The Strong National Museum of Play dates the game to 1984.
Yet the game Americans came to know as Kung Fu had already passed through several identities before reaching the NES. It began with Irem, martial arts cinema, and a Japanese arcade game called Spartan X. It crossed the Pacific as Kung-Fu Master, became a successful coin-operated release through Data East, and then passed through Nintendo’s own development organization on its way to the Famicom and NES.
Along that path, Kung Fu became connected not only to the birth of the beat ’em up but also to Shigeru Miyamoto’s early side-scrolling work, Koji Kondo’s first years at Nintendo, the launch period of the NES in the United States, and eventually even the creation of Street Fighter.
From Martial Arts Movies to Spartan X
The story begins in the extraordinary international popularity of martial arts cinema during the 1970s and early 1980s. Bruce Lee had helped transform martial arts into a worldwide pop culture phenomenon, while a new generation of Hong Kong performers, including Jackie Chan, Sammo Hung, and Yuen Biao, pushed the genre toward faster choreography, dangerous stunt work, and action comedy.
In 1984, Chan, Hung, and Yuen starred in Wheels on Meals, a Hong Kong film largely set in Barcelona. In Japan the movie was released under the title Spartan X. Irem used that same name for its new arcade action game.
The connection between film and game was loose. Thomas, the name of Jackie Chan’s character in the movie, became the hero of the game, while Sylvia became the woman he had to rescue. The structure of the actual game, however, moved far beyond a straightforward adaptation. Thomas entered a five-story stronghold where increasingly dangerous opponents waited on successive floors, a design that also recalled the famous multi-level martial arts structure associated with Bruce Lee’s unfinished Game of Death project. Later histories of the game have consequently treated Spartan X as a mixture of martial arts influences rather than a conventional movie adaptation.
The designer behind the arcade game was Takashi Nishiyama, a figure whose importance would become clearer as fighting games evolved. Nishiyama later remembered that while working at Irem he made Spartan X, known overseas as Kung-Fu Master. After leaving Irem for Capcom, he said he was able to improve on what he had done there, a process that eventually produced the original Street Fighter.
That later connection makes Spartan X especially important. It was not simply an isolated martial arts game that happened to become popular. One of its principal creators carried ideas from it directly into another project that helped establish the competitive fighting game.
The Arcade Game Becomes Kung-Fu Master
Outside Japan, Irem removed the Spartan X name and marketed the game as Kung-Fu Master. The change gave the arcade release an identity that could stand independently from the Japanese movie tie-in.
Contemporary trade records show how deliberately Irem expanded the game overseas. In its February 15, 1985 issue, the Japanese amusement newspaper Game Machine reported that Irem had granted Data East exclusive selling rights for North America, including Canada. Electrocoin received rights for the United Kingdom and Ireland, while additional agreements covered markets in continental Europe and Australia. According to the same report, Data East had signed its American agreement on January 10 and was beginning North American sales in mid-January. Game Machine specifically noted that the game continued to be sold as Spartan X in Japan.
The game was already performing strongly at home. In Game Machine’s February 15 chart, Spartan X, identified in English as Kung Fu Master, stood at the top of the table-style video game rankings with a rating of 7.70. It had become more than another movie-related arcade release. It was one of the prominent Japanese coin-operated games of early 1985.
Its American life was substantial as well. Late in 1985, months after its introduction, Play Meter’s operator survey still placed Data East’s Kung Fu Master at number sixteen among video games in the United States. That longevity is significant in an arcade business where operators constantly replaced older machines with newer attractions.
The underlying attraction was easy to understand. Kung-Fu Master translated the fantasy of the martial arts movie into a form that could be understood within seconds. There was no maze to memorize and little need for lengthy instruction. The hero moved left or right. Attackers closed in. Punches and kicks disposed of them. Greater threats appeared as the player advanced.
What Irem added was escalation.
Fighting Through the Devil’s Temple
The Nintendo manual later described Thomas as a skilled kung fu fighter who had mastered punches, kicks, and jump kicks. Sylvia had been captured by the mysterious gang “X” and was being held at the top of its stronghold. That was nearly all the story a player required.
The simplicity allowed the enemies themselves to become the game’s personality.
Ordinary Grippers rushed toward Thomas and tried to restrain him. Knife Throwers attacked from a distance. The smaller Tom Toms could leap into the air. Other sections introduced snakes, dragons, poisonous moths, and dangerous falling or exploding objects. Instead of merely increasing enemy health, the game kept forcing the player to recognize a different threat and respond quickly.
Every floor then ended with a specific boss. The first brought the Stick Fighter, whose weapon gave him greater reach than the ordinary attackers. The second ended with the Boomerang Fighter. The third featured the Giant, described by Nintendo as enormously powerful despite his slower movement. The fourth belonged to the strange Black Magician, whose supernatural tricks made him unlike the human fighters below. The fifth finally placed Thomas against Mr. X, the leader of the gang and the last obstacle between him and Sylvia.
These encounters seem modest beside the enormous bosses of later console games, but the structure was important. A mass of weaker enemies established the rhythm of a floor, then a named and mechanically distinctive opponent created a climax before the player advanced.
That rhythm became fundamental to action games.
The player was also encouraged to think beyond simple survival. Punches, kicks, and more difficult attacks could carry different scoring values, giving skilled players a reason to choose one technique over another even when a safer attack might work. The game retained the score-chasing mentality of the arcade while wrapping it inside a visible journey toward a destination.
Nintendo Takes Over the Home Conversion
The next stage in the game’s history brought it directly into Nintendo’s rapidly developing Famicom business.
Nintendo released the home version in Japan as Spartan X in June 1985. Years later, a conversation among Nintendo developers preserved in the company’s Iwata Asks series revealed where the game fell within Shigeru Miyamoto’s remarkable run of mid-1980s projects.
Miyamoto remembered working with programmer Toshihiko Nakago on Excitebike before they “started in on Kung-Fu.” Koji Kondo, still early in his Nintendo career, remembered helping with the game, with Miyamoto identifying his contribution as sound effects. Nintendo’s own notes date the Famicom release to June 1985.
The chronology is striking because of what came next. Miyamoto recalled that after Kung-Fu, the group began making Super Mario Bros., with Kondo placed in charge of sound. Kung Fu therefore sits directly inside the development sequence that led into one of the most important games Nintendo ever released.
That does not make Kung Fu a disguised prototype for Super Mario Bros., and the games have very different purposes. It does show that Nintendo’s conversion was being handled by developers who were simultaneously learning how to create fluid side-view action for the Famicom. Excitebike, Kung Fu, and Super Mario Bros. arrived in remarkably close succession, and all required the designers to think about movement across horizontally scrolling spaces.
For a licensed conversion of somebody else’s arcade game, Kung Fu therefore occupied an unusually interesting position inside Nintendo.
From Spartan X to the NES Black Box
When Nintendo brought the game west, the name changed again. The Japanese Famicom cartridge remained Spartan X, but Nintendo’s American version became simply Kung Fu.
The packaging placed it among the company’s recognizable early “black box” releases, whose covers used large screenshots or pixel-art imagery against dark backgrounds and divided games into simple categories such as Action Series, Sports Series, and Programmable Series.
Kung Fu became part of Nintendo’s earliest American NES offering during the system’s New York introduction on October 18, 1985. Surviving cartridge records identify the North American game as NES-SX-USA, while contemporary packaging presented the same direct promise as the arcade original: fight through increasingly dangerous opponents and rescue Sylvia from the top floor.
That placed a game born in Japanese arcades beside titles such as Super Mario Bros., Duck Hunt, Excitebike, Ice Climber, Hogan’s Alley, Wrecking Crew, and Wild Gunman during the NES’s formative American period.
There was an important difference, however. Many players encountering Kung Fu on a Nintendo console had no reason to know that its history stretched backward through Irem and Data East. To them it looked like a Nintendo game, carried Nintendo branding, and sat beside Nintendo’s other early releases.
The original lineage was still visible to contemporary reviewers who were paying attention.
An Arcade Game Rebuilt for Nintendo’s Console
In April 1986, Computer Entertainer explicitly explained that Kung Fu was Nintendo’s version of a Japanese Irem coin-operated game, noting that Data East had licensed the same title for American arcades as Kung Fu Master.
The publication had already seen computer conversions of the arcade game, but it responded much more favorably to Nintendo’s version. The review praised the conversion’s action, speed, challenge, responsive control, and playability, even arguing that its graphics compared favorably with the Apple II and Commodore versions. Most revealingly, the magazine said it was easy to understand why Kung Fu had become one of the early best-selling games for the NES.
For players who had experienced the arcade machine, the appeal was obvious. The NES could not reproduce every aspect of contemporary arcade hardware, but the important rhythm remained intact. Thomas still had to punch through crowds, duck and jump around threats, react to knife throwers, survive the bosses, and climb toward Sylvia.
The home version also demonstrated an important lesson about arcade conversion. Faithfulness did not always require technological equality. What mattered was preserving the behavior that made the original recognizable.
Kung Fu remained Kung Fu because the pressure never stopped.
A Different Kind of Difficulty
Modern players can finish a successful run through Kung Fu far more quickly than they might expect from a later console game. That brevity is partly the result of its arcade ancestry.
The game was not designed around dozens of stages, lengthy cutscenes, saved progress, character development, or exploration. Its longevity came from repetition, score, faster reactions, and the possibility that a small mistake could end a promising run.
Thomas might appear powerful when knocking down a line of ordinary attackers, but the game constantly attempts to break the player’s rhythm. A Gripper holds him in place while another enemy approaches. A Knife Thrower forces attention away from the nearest attackers. A Tom Tom changes the vertical space Thomas must defend. The bosses punish a player who relies on the same attack without learning distance and timing.
The five-story structure also helps the difficulty feel like a climb. Every staircase creates a small sense of progress, while Sylvia waiting above gives the journey a destination that many early arcade games lacked.
Once Mr. X falls and Sylvia is rescued, however, the challenge is not necessarily over in the arcade tradition. Mastery matters more than seeing a long ending sequence. The point is to become better at the same dangerous journey.
The Missing Link Between Arcade Genres
Calling Kung-Fu Master the first side-scrolling beat ’em up can make the game sound more modern than it actually is. Later beat ’em ups expanded the formula considerably. They added deeper movement, cooperative play, larger groups of differentiated enemies, weapons, throws, elaborate environments, and much more complicated combat systems.
Yet the basic relationship is visible.
Earlier action games had certainly featured hand-to-hand combat, and martial arts games existed before Irem’s release. What Kung-Fu Master did particularly well was combine fighting with horizontal progression and repeated attacks from groups of enemies. Combat was no longer simply a duel. It became movement through hostile territory.
That distinction helped open a new branch of action-game design.
The genre would evolve dramatically when games such as Technos Japan’s Renegade and Double Dragon expanded movement and street-fighting mechanics. Capcom’s Final Fight later pushed the arcade brawler toward larger characters and spectacular cooperative action. Sega’s Streets of Rage carried a similar tradition into the home console market.
By then the five plain corridors of Kung-Fu Master could appear primitive, but the basic fantasy remained familiar: advance, get surrounded, fight free, keep moving, confront the boss.
From Mr. X to Street Fighter
Perhaps the most important evidence for the game’s influence comes directly from Takashi Nishiyama.
Looking back on his career, Nishiyama said that while at Irem he had made Spartan X, which he remembered as Kung-Fu Master overseas. After Capcom recruited him, he was able to develop ideas from that earlier game further, and the result became Street Fighter.
Later historical work on the creation of Street Fighter has made the connection even more specific. The Video Game History Foundation’s discussion of Matt Leone’s research describes Kung-Fu Master as something like a conceptual predecessor to Street Fighter. The idea was to take the excitement of the boss confrontations and build greater depth around that kind of encounter.
This provides Kung Fu with an unusual place between two genres.
Behind it stood the martial arts games, action games, and movie influences of the early 1980s. Ahead of it stood both the scrolling beat ’em up and, through Nishiyama’s later work, one of the foundational series of competitive fighting games.
The ordinary Grippers running at Thomas and the bosses waiting at the end of each floor were therefore part of two different evolutionary paths. One led toward crowds of enemies in games like Double Dragon and Final Fight. The other emphasized the dramatic one-on-one confrontation until the boss fight itself became the entire game.
More Important Than Its Five Floors Suggest
Four decades later, Kung Fu can be easy to underestimate.
Its backgrounds repeat. Its story can be summarized in a sentence. Its basic enemies use only a handful of behaviors. A skilled player can see everything the game contains far faster than it would take to finish most later NES releases.
Historical importance, however, is not measured by how much content a cartridge contains.
Kung Fu preserves a moment when several major strands of video game history crossed one another. It began as Irem’s Spartan X, carrying the influence and marketing power of martial arts cinema. It became Kung-Fu Master in Western arcades and achieved enough success to remain visible in American operator rankings late into 1985. Nintendo then converted it for the Famicom, with Miyamoto and Nakago involved and Kondo contributing sound effects, immediately before that development circle moved into Super Mario Bros. The resulting NES edition became part of Nintendo’s earliest American software lineup.
Meanwhile, Takashi Nishiyama carried lessons from Spartan X into Capcom, where they contributed to the thinking behind Street Fighter.
That is an extraordinary amount of history for a game about one man climbing five floors.
A player in 1985 only had to know that Sylvia was waiting at the top and Mr. X stood in the way. In retrospect, Thomas was climbing through something larger. Each floor belonged to the transition from the arcade culture of the early 1980s toward genres and franchises that would shape action games for decades.
The punches were simple. The legacy was not.
Sources & Further Reading
Nintendo of America. Kung Fu Instruction Booklet. NES-SX-USA. Nintendo of America, ca. 1985–1986. https://www.gamingalexandria.com/highquality/NES/Kung%20Fu/Kung%20Fu%20Manual%20-%20Original.pdf
Irem. Spartan X Sales Flyer. Japan, 1984. International Arcade Museum, Arcade Flyer Archive. https://flyers.arcade-museum.com/videogames/show/4095
Nihon Bussan/AV Japan. Kung-Fu Master Sales Flyer. United States, 1984. International Arcade Museum, Arcade Flyer Archive. https://flyers.arcade-museum.com/videogames/show/541
Nihon Bussan/AV Japan. Kung-Fu Master Sales Flyer. Alternate version. United States, 1984. International Arcade Museum, Arcade Flyer Archive. https://flyers.arcade-museum.com/videogames/show/5156
International Arcade Museum. “Kung-Fu Master.” Museum of the Game. Includes surviving cabinet information, installation instructions, manuals, flyers, controls, and hardware documentation. https://www.arcade-museum.com/Videogame/kung-fu-master
International Arcade Museum. “Spartan X.” Museum of the Game. Includes surviving Japanese manual and arcade documentation. https://www.arcade-museum.com/Videogame/spartan-x
Nintendo. “Original Super Mario Developers.” Iwata Asks: Super Mario Bros. 25th Anniversary, vol. 5. Nintendo, 2011. https://iwataasks.nintendo.com/interviews/wii/mario25th/4/1/
Nishiyama, Takashi. “Interview with Takashi Nishiyama.” Interview originally published by 1UP, 2011. Preserved by Cultura Neo Geo. https://www.culturaneogeo.com/imagenes/entrevistas/streeteng.htm
Nakano, Tetsuo, Kozo Okada, Michiru Kawai, Kanae Saeda, Masato Ishizaki, and Yoshiyuki Takashima. “Irem Arcade Games: 1989 Developer Interview.” Originally published in Gamest, 1989. Translated by Shmuplations, December 29, 2021. https://shmuplations.com/irem/
“Five-Scene Fighting.” Game Machine, January 1, 1985. https://onitama.tv/gamemachine/pdf/19850101p.pdf
“Best Hit Games 25.” Game Machine, February 15, 1985. https://onitama.tv/gamemachine/pdf/19850215p.pdf
Play Meter. “ADE ’85” trade-show coverage. April 15, 1985. https://elibrary.arcade-museum.com/Play-Meter/1985-April-15/41
Lewin, Gene. “Gene’s Judgements.” Play Meter, June 15, 1985, 38–39.
Play Meter. National Operator Survey. December 15, 1985, 44. https://elibrary.arcade-museum.com/classic/Play-Meter/1985-December-15/44
Play Meter. Year-End Issue. December 31, 1985. International Arcade Museum Library. https://elibrary.arcade-museum.com/magazines/pm/PlayMeter-1985-12-31/PlayMeter-1985-12-31-036.pdf
Edgeley, Clare. “Arcade Action: Kung-Fu Master.” Computer and Video Games, 1985.
Roberts, Mike. “Coin-Op Connection.” Computer Gamer, no. 2, May 1985, 26–27.
Computer Entertainer. “Kung Fu.” Vol. 5, no. 1, April 1986. https://upload.wikimedia.org/wikipedia/commons/f/f3/Computer_Entertainer_5-1.pdf
Famitsu. “1985年6月発売 全機種のゲーム発売日スケジュール.” Famitsu.com. Records Spartan X for Famicom on June 21, 1985. https://www.famitsu.com/schedule/all-platforms/198506
Kodansha. Star Force, Spartan X, Wrecking Crew. Tokyo: Kodansha, 1985. Game Preservation Society catalog. https://www.gamepres.org/catalog/?id=8814004605008
The Strong National Museum of Play. “Arcade Game: Kung-Fu Master.” Object 106.349. Google Arts & Culture. https://artsandculture.google.com/asset/arcade-game-kung-fu-master-irem/GAGX1AIXNN8Qqw
Video Game History Foundation. “Matt Leone and the Making of Street Fighter 1.” The Video Game History Hour. https://gamehistory.org/episode-2-matt-leone-and-the-making-of-street-fighter-1/
Guinness World Records. “First Side-Scrolling Beat-Em-Up.” Guinness World Records. https://www.guinnessworldrecords.com/world-records/first-side-scrolling-beat-em-up
Alpert, Ron. “Retro Game of the Day! Kung Fu.” Game Developer, January 14, 2010. https://www.gamedeveloper.com/production/retro-game-of-the-day-kung-fu
“Kung-Fu Master.” Retro Gamer, no. 232. https://pocketmags.com/ca/retro-gamer-magazine/issue-232/articles/kung-fu-master
Arcade-History. “Kung Fu, Model NES-SX-USA.” Arcade-History. https://www.arcade-history.com/?id=54299&n=kung-fu-model-nes-sx-usa&page=detail
NES Cart Database. “Kung Fu.” NESCartDB. Cartridge, PCB, ROM, and production-variant documentation. https://nescartdb.com/profile/view/1334/kung-fu