Censorship
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This is a non-exhaustive list of the games censored on the Master System.

Censorship[]

Action Fighter[]

  • The Sega Mark III screen is not featured in the International versions.
  • The game omits many stuff from the Arcade version, including the fact that the main character is female.

Aerial Assault[]

  • The Sega logo screen does not appear if the game is booted in International models, despite a Japanese or Korean versions never being materialized.

Alex Kidd in Miracle World[]

  • Later releases from 1990 and ownard replaced the onigiri (rice ball) with a hamburger.

Alex Kidd: High-Tech World[]

  • The game was originally a tie-in with the Anmitsu-hime anime and was poorly adapted to International audiences.

Alex Kidd: The Lost Stars[]

  • The Sega logo screen does not appear if the game is booted in International models.

Asterix and the Secret Mission[]

  • In Brazil, the game was turned into a tie-in with the TV Colosso franchise. All characters (including enemies), plot and some music were altered.

Astro Warrior[]

  • The Brazilian re-release features Sapo Xulé as the main spaceship, altering the game's plot and the scenery, which is now set in a polluted lake. The enemies, bosses and stage names were also changed.

Aztec Adventure[]

  • The instruction manual in the International version implies the game's setting is set in Central America, but in real life, the Aztec empire itself didn't colonize any terrain outside Mexico.

Back to the Future Part III[]

  • The game can only be played in 50Hz systems, which means it cannot be played models sold in US, Japan, South Korea and Brazil. It is currently unknown if this behavior is intentional or not.

Bank Panic[]

  • Names of the NPCs were changed from the SG-1000 iteration, which the Master System version is based off. The Brazilian release further gives new names for the NPCs in the instruction manual.

Black Belt[]

  • References to Fist of the North Star and its respective likeness were removed in the US versions. All the characters, items, plot and some of the music were changed.
    • With the release of Fist of the North Star: Lost Paradise, the original Japanese version was kept intact with minor alterations in the title screen.

Body Slam[]

  • The US version removes the likeness of Dump Matsumoto and all the wrestlers are now male. Some cutscenes and speech were added, while some of the music were changed.
    • In consequence, the Sega Mark III screen from the Japanese version was also removed.

Bubble Bobble[]

  • The food items are different in the International version.

California Games[]

  • The Brazilian re-release omitted most of the events.

Captain Silver[]

  • The US version features less levels than the Japanese and European versions.

Cloud Master / Chuuka Taisen[]

  • Power-up icons are different when played in International models. The level names were not shown as well.

Cyborg Hunter[]

  • The game featured the tie-in of the Borgman anime, but was removed in the International version.

Columns[]

  • The Brazilian release was named as Shapes and Columns, as Columns in Brazil was already being trademarked at the time. The in-game name still remains as Columns.
    • This change also applies to both Genesis and Game Gear versions.

Dragon Crystal[]

  • Most sentences were changed in the Master System version were spoken in third person. The Game Gear version, which was released first, featured sentences about items in first person for most of the time.
  • Item names are based in the International version released on the Game Gear.

Dynamite Duke[]

  • The Sega logo screen does not appear if the game is booted in International models, despite a Japanese or Korean versions never being materialized.

Enduro Racer[]

  • Only half of the actual data from the Japanese version is featured in the International version.
  • The Brazilian release was named Super Cross, likely to avoid confusion with the Enduro game released for the Atari 2600. The in-game name still remains as Enduro Racer.

F-16 Fighting Falcon[]

  • Support for the SK-1100 Sega Keyboard and Mark III Link Cable were removed in the International versions. Instead, two control pads are used to play the game properly.
  • Later re-releases are known as F-16 Fighter outside Japan.
    • The Sega Mark III screen was also removed in International versions.
  • All versions of the game are incompatible with the Sega Genesis through a Power Base Converter due to its reliance on the legacy SG-1000 video mode.

Fantasy Zone[]

  • The Sega Mark III screen is not featured in the International versions.

Fantasy Zone II: The Tears of Opa-Opa[]

  • The Sega Mark III screen is not featured in the International versions.

Fantasy Zone: The Maze[]

  • The Sega Mark III screen is not featured in the International versions.

Forgotten Worlds[]

  • The game is for one player only. With this, further instances in the game script were altered just to the first Unknown Soldier itself
  • The shopkeeper is named "Lucia", while her official name is "Sylpie".
    • A similar change was done in the Genesis version, where she was named as "Mirabella" instead.

Galactic Protector[]

  • The Sega Mark III screen does not appear if the game is booted in International hardware.

Galaxy Force[]

  • The Sega logo screen does not appear if the game is booted in International models, despite a Japanese version never being materialized. This was truly proven in re-releases of the game years later.

Ghostbusters[]

  • The Sega Mark III screen does not appear if the game is booted in International hardware.
  • Gozer is called "Gorza" in this version, likely by originating from a bad translation of the Japanese dub from the movie.

Ghost House[]

  • The Sega Mark III screen is not featured in the International versions.
  • The Brazilian re-release swaps the main character with El Chapulin Colorado, a Mexican superhero. The plot was also changed, while new cutscenes were added.

Golden Axe[]

  • Due to both Tyris and Gillius being removed from this version, the story was rewritten to be focused only in Ax Battler.
    • The ending is taken more seriously than the Arcade and Genesis versions.

Great Baseball (1985)[]

  • The game is based but at the same time, lacks an official Nippon Professional Baseball license, so, the teams are only represented as capital letters.

Great Baseball (1987)[]

  • The game is based but at the same time, lacks an official Major League Baseball license, so, the teams are only represented with their state name.
  • The Japanese version, The Pro Yakyuu Pennant Race, features graphical changes and new music. As with the 1985 game, it lacks an official NPB license, so, the teams are only represented as capital letters. In addition, all synthesized speech is in Japanese as well.
    • If booted on International hardware, the Sega Mark III screen does not appear, but in-game text remains in Japanese.
  • The Game Gear port of the Japanese version, The Pro Yakyuu '91, also does not feature a NPB license either, although all the music is different.

Great Ice Hockey[]

  • The Japanese version of the game was only released as a prize cartridge in Japan and shipped with their own Sports Pad, as the International model is incompatible with both Sega Mark III and Japanese hardware.
    • Due to its limited release, it lacks a proper Sega Mark III / Master System branding in the cartridge.
    • In the instruction manual, the first and last pages, as well the Scorebook page, were not localized in Japanese.

Great Soccer[]

  • The European version of the 1985 game omits the additional Sega Mark III logo screen.

Hang-On[]

  • The US and European versions of the game have the roads painted in gray, while in the Japanese version, is aqua green.

Heavyweight Champ[]

  • The original Master System version of this game featured the likeness of James "Buster" Douglas. The player character is Douglas himself, but was renamed as S.Davis in the 1991 version.
  • A 1992 re-release of this game featured George Foreman and was released only in Europe and Brazil. It replaces S.Davis with Foreman himself.
    • The Game Gear version in Japan featured A.Duran as a player character.
  • The boxing ring had the Sega logo removed in the George Foreman version and replaced with the Acclaim logo.
    • In the Game Gear versions, the Sega logo was kept in the International version, but for Japan, it was replaced with the SIMS logo.

Jurassic Park[]

  • Unlike the Game Gear version, which the Master System version is based on, the sprites of the playable character is Alan Grant itself. However, through screenshots in the instruction manual, it still features the character from Game Gear version, which is implied to be Alan Grant, but it does look more like Ellie Sattler in a suit.

Kenseiden[]

  • The Sega logo screen does not appear if the game is booted in International models.
  • The Korean version is heavily censored, by changing the plot to be in feudal Korea, as well the main character's hair being blond.

Kung Fu Kid[]

  • The Sega Mark III screen is not featured in the International version and the Brazilian re-release.
  • The Brazilian re-release features Sapo Xulé over the main character, in contrast, altering the game's plot.

Lord of the Sword[]

  • It is impossible to get the bad ending in the International versions due to a continue counter bug. In the Japanese version, it can be achieved if 5 continues or more were used.

Mahjong Sengoku Jidai[]

  • If booted on International hardware, the Sega Mark III screen does not appear, but in-game text remains in Japanese.
  • The game is supposed to be a family-friendly adaptation of Mahjong Kyou Jidai, an erotic mahjong game from Sanritsu released for Arcade, which also is the developer of this game, although this is not confirmed.

Master of Darkness[]

  • The European and Brazilian releases drops the "Vampire" from the name, which was carried from the Japanese and US versions in the Game Gear.
    • The Brazilian Game Gear version still features "Vampire" in the name, as it was directly based in the US version.

Michael Jackson's Moonwalker[]

  • Michael Jackson as a name was removed from the title outside the game in the Brazilian and Korean releases, being only named as "Moonwalker".
    • This was also carried over the Genesis version in Brazil.

Mick & Mack as the Global Gladiators[]

  • All releases of the Master System version removes the Mick & Mack as the from the boxart and instruction manual, being only named as "Global Gladiators".
  • The European release does not follow the standard color scheme of red cartridge labels, but rather, is in white and blue. This was reverted for the Australian and Brazilian versions.

Miracle Warriors: Seal of the Dark Lord[]

  • The Sega Mark III screen was removed from the International versions.
  • Certain female enemies had her nipples removed in the International versions. The key art was also changed, as the original art in the Japanese version had a succubus with her breasts exposed right away.
  • The Brazilian version removes the subtitle from its boxart.

Missile Defense 3-D[]

  • One of the working names for the game was World War 3-D, which was renamed to its final name likely to avoid countryside conflicts.
    • The game still is set during the Cold War.

Monopoly[]

  • The Sega Mark III screen does not appear if the game is booted in International models, despite a Japanese or Korean versions never being materialized.

Mortal Kombat[]

  • All changes are shared with the Game Gear version:
    • The gore is disabled by default, but can be re-enabled with a cheat code.
    • The stage fatality for The Pit is not included.
    • Most voices are missing.
    • Kano and Reptile are missing.
  • The game was officially rated as an +15 game in Australia and virtually rated as a +14 game in Brazil. The European version lacks an official age rating.
  • The Australian version features a different cartridge label, by telling players to dial into a "hints and tips" hotline.

Mortal Kombat II[]

  • All changes are shared with the Game Gear version:
    • Besides Kombat Tomb, stage fatalities were removed.
    • All characters only have one Fatality rather than two. Friendships were also removed.
    • Most voices are missing.
    • Rayden, Baraka, Cage, Kung Lao and Noob Saibot are missing.
  • The Australian version was sold with a silver cartridge shell, while the European and Brazilian versions remains the same.
  • The game was virtually rated as an +18 game in Brazil, while the European and Australian versions are rated +15.

Mortal Kombat 3[]

  • Changes are shared with the Game Gear version:
    • Shang Tsung, Liu Kang, Stryker, Nightwolf and Motaro are missing.
    • Secondary fatalities, Friendship and Animality are not featured.
    • Most voices are missing.
  • This version was virtually rated as an +18 game in Brazil, despite the Game Gear version being officially rated as 11-14 from ELSPA at the time.

My Hero[]

  • The Sega Mark III screen is not featured in the International versions.
  • There's no more time travel elements as it was in the Arcade version, all the game's scenario is set in present day. All enemies that was available in the Arcade version during these stages were replaced with more generic characters.
    • The frog enemy was later featured in Alex Kidd in Miracle World, replicating the same behavior.
  • The cameo of Gonbee from the Arcade game I'm Sorry was removed.
  • The Brazilian release of the game changes the game's title as Gang's Fighter. It is still named as My Hero in-game.
  • In Korea, it was released two times with different names, with neither of them matching the Korean localization for the Arcade version.
  • The late re-release of the game in Portugal features a different art in the box.

Operation Wolf[]

  • In all regions, the boxart features artwork from Operation Thunderbolt rather than Operation Wolf. Other than that, it is based on the NES version.
  • For unknown reasons, the game was not released in US and Canada, but was released on Mexico by an authorized importer from Sega of America. Other than that, it is based in the European release.

OutRun 3D[]

  • The Sega logo screen does not appear when the game is played on International models, despite the game never being released in Japan years later.
  • Two musics from the original OutRun, Passing Breeze and Splash Wave, were supposed to be featured in the game according to prototype data, but was cut out from the final version.
  • The game has hidden Paddle Control support when played in Japanese hardware. It also has FM Sound Unit support as well, which goes unused in International models.
  • The Sega 3D Classics release of the game for 3DS changes the car to be less identical to a Testarossa.
  • The European versions of the game changes the name to Out Run 3-D in the box art, while in-game, it is OutRun 3D. The Brazilian version fixes the 3D but not the space between Out and Run.

OutRun Europa[]

  • The game was called OutRun Europe during the development, but the Europe was dropped in favor of Europa instead.

Pac-Mania[]

  • In the first iterations of International models, Pac-Man shoves the Sega logo from the system's BIOS to the right side of screen until the TecMagik logo fully appears. This does not happen in Master System II models and Japanese or Korean systems.
  • The European version has a white label for the cartridge. The Australian cartridge features the standard red cartridge label.

Paperboy[]

  • The European version has a white label for the cartridge. The US, Australian and Brazilian cartridge features the standard red cartridge label.

Parlour Games[]

  • The bunny ears from the girls' costumes were removed in the International versions.

Penguin Land[]

  • The Sega Mark III screen was removed from the International versions.
  • Re-releases of the game made by AtGames in their plug 'n play hardware removes the "Edit" mode.

PGA Tour Golf[]

  • Both European and Australian cartridges feature a white label over the traditional red featured in other games.

Pit Pot[]

  • The game includes an anti-backward compatibility message when played in a SG-1000 or SC-3000, as both systems shares the same Sega Card connector. This only applies to the Japanese version.
  • The European release of the game, bundled with Astro Warrior, removes the "Edit" mode. This version also removes the Sega Mark III screen.
    • The mode and the Sega Mark III screen were kept intact in the Brazilian re-releases included in clone hardware made by TecToy.

Pit-Fighter[]

  • The Master System version features a completly different soundtrack over the Arcade original.
  • The European version has a white label for the cartridge. The Brazilian version follows TecToy's later cartridge label standard by being blue as usual.

Phantasy Star[]

  • Select items were renamed in the International version, notably, the healing items being renamed as "Cola" and "Burger". Code for the FM Sound Unit detection was removed as well.
    • The official Brazilian translation is based in the International version.
  • The title screen from the Korean version is different. Other than that, it is based in the International version.

Populous[]

  • One of the hidden messages from the developer was not translated in English, being leftout in Swedish. It is unknown if it was done in purpose.
  • The European version has a white label for the cartridge. The Australian and Brazilian versions follows their cartridge label color standards as usual.

Poseidon Wars 3D[]

  • The Sega logo screen does not appear when the game is played on International models, despite the game never being released in Japan or South Korea.
  • The game was called Submarine 3D during the development, as it was inspired by SubRoc 3D.
  • The US and European versions of the game changes the name to Poseidon Wars 3-D, while in-game, it is Poseidon Wars 3D. The Brazilian version fixes the 3D in the box art.
  • The "Davy Jones locker" pun at the back of the box art is not featured in other languages other than English in the European and Brazilian versions.

Power Strike[]

  • The Sega Mark III screen was removed from the International versions.
  • The US version features a different box art and instruction manual in monochrome due to its nature of being distributed through mail order.
  • The European, Australian and Brazilian versions uses the art from the Japanese version in the box, however, the Aleste logos printed in the plane is censored with a black rectangle.
    • The Korean version keeps the Aleste logos in the plane.
  • While the Japanese version does not include a proper story, all Western versions adds a plot about mutant vegetation overtaking all human life through the power of brainwashing.
    • The MSX version, released later, added a proper story.

Power Strike II[]

  • This version is not a port of the Game Gear game, despite being released only in Europe, Australia and Brazil.
  • The Brazilian version runs too fast due to the game being optimized to run only in 50Hz systems. This was fixed in Aleste Collection, by forcing the game to be played in 50Hz.

Psychic World[]

  • Both Master System and Game Gear versions were meant to be named as Psycho World, the original name for the MSX version.
  • The Sega logo screen is not displayed when playing in International models, despite the game never being released for Japanese or Korean models.
    • Japanese text from the Japanese Game Gear version is unavailable.
  • Most of the graphics were redrawn to be less detailed and bigger, compared to the Game Gear version.
  • An additional level set inside a volcano was added in the Master System version, which the Game Gear version lacked it.
  • The artwork for the boxart is different from the Japanese and US versions on Game Gear.
  • Cutscenes are different from both MSX and Game Gear versions.
  • The game was released in Mexico as courtesy of an importer licensed from Sega of America. Other than that, it is based on the European version.

Psycho Fox[]

  • A Sega logo screen is only featured if the game is running in Japanese systems, which is impossible to achieve in official ways.
  • The Brazilian version replaces the characters with Sapo Xulé and his friends, also altering the plot and certain items as well.

Putt & Putter[]

  • The Brazilian release of this game was named Minigolf, to avoid sexual puns with the word "Puta" (romance slang for "prostitute"). The in-game name still remains as Putt & Putter.
    • The Game Gear version was also affected with the same changes as well.

Quartet[]

  • International versions of the game made Mary to be look less as a Japanese idol, with her hair color and portrait faces being changed.
    • In the sound test, Mary still features her look from the Japanese version.

R-Type[]

  • The Sega logo screen is not displayed when playing in International models.
  • The artwork for the box art in International versions is different than the Japanese version.

R.C. Grand Prix[]

  • The cartridge label in the US version is white, as opposed to the standard red label. This was reverted on the European, Australian and Brazilian versions.

Rainbow Islands[]

  • The Brazilian version removes the mention of Sega in the title screen.

Rambo III[]

  • The Sega Mark III screen is not displayed when playing in International models.
  • The Korean version uses a sprite of John Rambo from the title screen in shades of blue as its respective artwork in the box art.
  • The game has complete FM Sound Unit support, but due to programming errors, it is disabled by default, even if one manages to install one somehow.

Rampage[]

  • The Sega logo screen is not displayed when playing in International models, despite the game never being released for Japanese or Korean models.
  • The US version features a slightly different cartridge label, with the game and Activision logos. This was reverted in the European, Australian and Brazilian versions.

Rampart[]

  • The cartridge label in the European version is white, as opposed to the standard red label. This was reverted on the Australian version.

Rastan Saga[]

  • The game is based on the MSX version, which was released a year earlier.
  • The Sega logo screen is not displayed when playing in International models, despite the game never being released for Japanese or Korean models.
  • The Game Gear version, released only in Japan, was based on the Master System version, although the name was changed to Rastan Saga. The font graphics were altered and FM Sound Unit support was removed.
    • If played on International models of Game Gear, the Sega logo does not appear.

Renegade[]

  • The game is based on the NES version, released much earlier.
  • All graphics were redrawn for this version.
  • Most music were slightly arranged from the NES version, including the Staff Roll theme.
  • The box art features different artwork for the protagonist, and does not reflect his in-game appearance on cutscnes and his sprites.

Rescue Mission[]

  • FM Sound Unit support is included in the game, despite the game never being released for Japanese or Korean models, leaving this feature to be unused on International models.
  • The game's name during the development was Combat & Rescue, before being dropped.

Road Rash[]

  • The cartridge label in the European version is white, as opposed to the standard red label. This was reverted on the Australian and Brazilian versions.

RoboCop vs The Terminator[]

  • The cartridge label in the European version is black, as opposed to the standard red label. This was reverted on the Australian and Brazilian versions.

Rocky[]

  • The Sega Mark III screen is not displayed when playing in International models.
  • International releases of the game features Rocky in a different pose in the box art compared to the Japanese version.
  • Lang's hand-drawn artwork in the instruction manual does not reflect his in-game appearance in all versions.

Running Battle[]

  • The Czech version includes a different instruction manual translated solely in Czech.
  • The game was released in Mexico as courtesy of an importer licensed from Sega of America. Other than that, it is based on the European version.

Scramble Spirits[]

  • The Sega logo screen is not displayed when playing in International models, despite the game never being released for Japanese or Korean models.
  • FM Sound Unit support is included in the game, despite the game never being released for Japanese or Korean models, leaving this feature to be unused on International models.

SDI: Strategic Defense Initiative[]

  • International versions were released as Global Defense.
    • The International versions also omits the Sega Mark III logo.
    • The International versions features different artwork in their box art compared to the Japanese and Korean versions.
  • The game's name during the development was Space Shooting, before being dropped.

Secret Command[]

  • The Japanese version features different characters.
  • The US version is a tie-in with the Rambo franchise and the characters and some music were altered.
  • The European version features Rambo clones in the title screen. The plot and in-game characters are the same as the Japanese version.
    • Due to licensing issues related to the US version, the European version was defined as the "current" US version by Sega themselves.

Sega Chess[]

  • The Sega Chess logo in the box art was removed in the Brazilian version.

Sensible Soccer[]

  • The cartridge features a blue label as opposed to the standard red cartridge label.

Shadow Dancer[]

  • The player cannot use Ninjutsu during boss fights in the Master System version.
  • The Shadow Dancer name is removed from both box art and instruction manual in the Brazilian version, likely to avoid puns with stripteasers. Instead, the subtitle of the Genesis version is used.
    • This change was also carried over the Genesis version in Brazil.
    • The Korean version removes the subtitle as a whole, since it is based on the original Arcade version.

Shadow of the Beast[]

  • The cartridge label in the European version is white, as opposed to the standard red label. This was reverted on the Australian and Brazilian versions.

Shanghai[]

  • The Sega logo screen is not displayed when playing in International models, despite the game never being released for Japanese or Korean models.
  • The game includes hidden Japanese text in the demonstration when playing on Japanese models through unofficial means.
  • FM Sound Unit support is included in the game, despite the game never being released for Japanese or Korean models, leaving this feature to be unused on International models.

Shinobi[]

  • The player cannot use Ninjutsu during boss fights in the Master System version.
  • The Sega logo screen is not displayed when playing in International models.
  • International releases of the game features a different artwork in their respective box arts.
    • The Brazilian re-release of the game also features a new logo.
  • This version was later used as a basis for the unlicensed NES version by Tengen.

Shooting Gallery[]

  • The Brazilian version of the game is named as Shooting G, for unknown reasons.

Slap Shot[]

  • The Sega logo screen is not displayed when playing in International models, despite the game never being released for Japanese or Korean models.
  • The cartridge label in the US version is white, as opposed to the standard red label. This was reverted on the European, Australian and Brazilian versions.
  • The game's name during the development was Slap Shoot, before being dropped.

Sonic Blast[]

  • The Japanese name from the Game Gear version, G Sonic, does not display if the game is played on Japanese or Korean models through unofficial means.
  • This version recycles the artwork and logo from the US version on the Game Gear in the box art.
  • As per tradition, Sonic is referred as a "Porcupine" rather than a "hedgehog".

Sonic Chaos[]

  • The Japanese name from the Game Gear version, Sonic & Tails, does not display if the game is played on Japanese or Korean models through unofficial means.
    • This also holds true to the Wii Virtual Console release in Japan.
  • Due to graphical differences, the Master System version feature less detailed graphics.
  • Several musics sounds totally different compared to the Game Gear version.
  • Sonic's bad ending in the Master System version is slightly different.

Sonic Spinball[]

The following changes also affects the Game Gear version:

  • Most of the soundtrack is different compared to the Genesis version.
  • The bonus stage is different, featuring a stage with platforming elements rather than an actual Pinball table in the Genesis version.
    • As a result, cameos of Adventures of Sonic the Hedgehog and (Saturday At Morning) Sonic the Hedgehog characters were removed.
  • The Australian version was released in a silver cartridge shell. This was reverted on the European and Brazilian versions.

Sonic the Hedgehog[]

  • Compared to the Genesis version and affecting the Game Gear version as well:
    • Most of the soundtrack is different.
    • Most stages looks and plays different.
    • Checkpoint Lamp is not available and checkpoints can only be validated if Sonic destroys a Checkpoint Monitor. This must be done again if Sonic loses a life as well.
    • Bonus Stages are different and have platforming elements.
    • 100 rings makes your ring counter go down to zero, as if it is with coins in older Mario games.
    • The 1UP counter does not go beyond 9.
    • A new music plays when Sonic loses a life.
    • Continues can only be gained by hitting a CONT Monitor in Bonus Stages.
    • Chaos Emeralds can only be found in specific spots in actual stages.
    • The ending and staff roll in both Master System and Game Gear versions are different.
  • Compared to the Game Gear version:
    • The Sega logo from Game Gear version is missing, as the Master System version was supposed to be played in International models.
    • Sonic sprites are less detailed.
    • The playfield of all stages are bigger.
    • All music only plays in Mono. In the Game Gear, all music plays in Stereo through headphones.
    • The game does not go back to the title screen in the Master System version, forcing the player to hit the Reset button or shutdown the system in later models.
  • The US box art was not modified from the European box art, the only difference between the two versions is the European barcode at the back being replaced with a sticker featuring a standard US barcode.
  • Some releases of the Australian version includes a hotline for "hints and tips" printed in the cartridge's label.
  • The built-in releases of the game included in certain European and Brazilian models omits the credits from the staff roll. The game stops on the score tally after the ending.

Sonic the Hedgehog 2[]

  • Compared to the Game Gear version:
    • All music is in Mono in the Master System version.
    • No Sega logo screen in the Master System version.
    • The music played in the intro is different.
    • No music is played in the title screen.
    • The Level Select screen is different including the font.
    • The music in boss fights plus the good ending are different.
    • All levels features slightly different aesthetics in the colors.
    • The Korean version uses artwork for the International versions in the box art and cartridge label rather than using the Japanese artwork as it was featured in the Korean Game Gear version.
  • The Australian version includes a hotline for "hints and tips" printed in the cartridge's label.

Space Harrier[]

  • The Sega Mark III screen was removed on the International versions.
  • Most speech samples were removed in the Master System version.

Space Harrier 3D[]

  • The Sega Mark III screen was removed on the International versions.

Speedball 2: Brutal Deluxe[]

  • The European version features a purple cartridge label. This was reverted in the Australian version.

SpellCaster[]

  • The International version removes references to the Kujaku Ou anime. Several music were also changed.

Spider-Man vs. The Kingpin[]

  • The US and Mexican versions recycles the same box art as the European version, which features the game's description in multiple languages.
    • The US and Australian cartridges, however, calls the game as "Spiderman" in their cartridge labels rather than "Spider-Man" as featured in the European and Brazilian versions.
  • Earlier copies of the European version lacks a Marvel copyright in the box art. This was fixed in later re-releases.
    • Another print run also features a Capcom copyright over the Marvel one. The reason for this is unknown.
  • Both Master System and Game Gear versions lacks a cheat mode, which was available in the Genesis version.

Spider-Man: Return of the Sinister Six[]

  • Both Master Systen and Game Gear versions features less enemies and most bosses' health were reduced, therefore, making it easier than the NES version.
  • The European version features a white cartridge label. This was reverted in the Brazilian version.

Spy vs. Spy[]

  • The Sega Mark III screen was removed on the International versions.
  • The box art from International versions is different than the Japanese and Taiwanese versions. The Sega Card art is also different as well.
    • The Korean version features a complete (likely stolen) artwork for both the box art and the Sega Card, likely due to Samsung not acquiring the rights from MAD.

Star Wars[]

  • The Master System version features longer levels compared to the Game Gear version.
  • The European version features a purple cartridge label. This was reverted in the Australian and Brazilian versions.

Street Fighter II[]

  • The Master System version removes Dhaslim, E.Honda and Vega (Balrog) as playable characters. Most of the soundtrack is also different.
  • Many speech samples were removed.
  • This game was virtually rated as +13 in Brazil.

Streets of Rage[]

  • The game can only be played in single mode, unlike the Genesis and Game Gear versions.
  • The Korean version features artwork from the International versions on the box art rather than recycling artwork from the Japanese Genesis and Japanese Game Gear versions.

Streets of Rage 2[]

  • Max is missing in both Master System and Game Gear versions.
  • The cutscenes are based on the Genesis version rather than adapted cutscenes found only in the Game Gear version.
  • The in-game title is Streets of Rage II, following the European Genesis and International Game Gear versions. This was carried for the Brazilian version as well.
  • No characters are featured in the title screen, unlike the Game Gear version.
  • The game can only be played in single mode, unlike the Genesis and Game Gear versions.
  • Super Attacks from the Game Gear version were removed. Holding the 1 button in the Control Pad does nothing.
  • Blaze's flying kick move was left intact, which was previously censored in the Game Gear version. However, she does not wear underwear in the Master System version.
  • Energy bar of the enemies are shown, which were previously removed in the Game Gear version.
  • The Korean version recycles artwork from the Japanese Genesis version of the original Streets of Rage.

Strider[]

  • The kanji for "Hiryuu" featured in the background is missing in the title screen of the Master System version.
  • Most stage backgrounds are missing and were been replaced with a black background.
  • Most cutscenes are different from the Genesis version.
  • The ending is different from the Arcade and Genesis versions. However, the ending in this version would be referenced in Strider Returns.
  • The Korean version uses the artwork from the International Genesis version on the box art and its cartridge label, as opposed to the one used in the Japanese and Korean Genesis versions.

Super Smash T.V.[]

  • The European and Australian cartridges features a white label as opposed to the standard red cartridge label.

Teddy Boy Blues[]

  • The Sega Mark III screen is not featured in the International version and its respective Brazilian re-release.
  • Due to copyright issues, music was changed in the International version.
    • The Japanese singer Yohko Ishino, which was featured only in the instruction manual, was not included in the International versions, by any means.
  • The Brazilian re-release changes the character with Geraldinho and also changes the plot.

Tecmo World Cup '93[]

  • The game is a port of an original soccer game for Game Gear called Kick & Rush, released as Tengen World Cup Soccer in US and Europe, which it does not have anything in common with other Tecmo World Cup games.

The Ninja[]

  • The game is an updated version of the game Sega Ninja. Named Ninja Princess for Arcades in Japan, the Japanese version on the Master System is named as Ninja Princess 1 Mega Ban: Ninja due to the original game being already available on SG-1000.
  • Due to the change in the name, the game also changes the protagonist to be a male ninja as well. The plot, enemies and music were changed as well.
  • The Sega Mark III screen was removed from the International versions.
  • The Korean version simply calls it as "Ninja". Other than that, it features the same changes as the Japanese version.

The Lucky Dime Caper Starring Donald Duck[]

  • In contrast to the Game Gear counterpart, the Master System version:
    • Features a time limit and Donald can lost a life if he is not holding any weapons, making the game more harder.
    • More lines of dialogue are featured in the Master System version, but with less cutscenes.
  • The Brazilian version uses localized names of Disney characters from national Donald Duck comics in the instruction manual. The subtitle is also translated as well.
  • The game was meant to be a tie-in DuckTales game during its development. It was also supposed to be a port of QuackShot Starring Donald Duck at one point, due to the continue music of both games sounding similar.

The Simpsons: Bart vs. the Space Mutants[]

  • The European and Australian cartridges features a white label as opposed to the standard red cartridge label. This was reverted on the Brazilian version.
  • The Brazilian and newer Portuguese releases of the game features different artwork in the box art.

The Simpsons: Bart vs. the World[]

  • The European and Australian cartridges features a white label as opposed to the standard red cartridge label. This was reverted on the Brazilian version.

The Smurfs[]

  • Most European releases of the game defaults the language of the title to French in the box art.
    • The Brazilian version renames it to use the English title instead.

The Smurfs Travel the World[]

  • All releases of the game, regardless of the system, defaults the language of the title to French in the box art.

TransBot[]

  • The name was changed from Astro Flash to TransBot as a form to cash in the success of Transformers.
    • The International version omits the Sega Mark III screen from the Japanese version.
  • In Brazil, the name of the game was changed as Nuclear Creature, likely to avoid sexual jokes with genders. The in-game name still remains as TransBot.

Wonder Boy in Monster Land[]

  • The Japanese version has a Monster World sub-name, to avoid issues with a Cassette Vision game called Waiwai Monsterland.
  • The drinks were named differently in both International version, being Ale or Mead.
    • The Brazilian version further replaces it with Vitamin (fruits mixed with milk) or Juice.
  • The choices for the quiz boss were altered in both International and Brazilian versions.
  • In Brazil, the game was turned into a tie-in with Mônica and Friends.
    • During the development, Mônica was initially meant to wield a sword, but her creator, Mauricio de Sousa, told TecToy to remove and replace it with her rabbit plush.

Wonder Boy III: The Dragon's Trap[]

  • The Sega logo screen does not appear if the game is booted in International models. This also holds true to the Brazilian release of the game.
  • The Korean version allows the player to hear musics in the FM Sound Unit mode. The name in the title screen is also changed as Monster World II.
  • As with the previous game, the game was turned into a tie-in with Mônica and Friends in Brazil. The characters, plot and the final boss were also altered.

Woody Pop[]

  • The code for reading the Paddle Control joystick when running the game in International models is buggy.

Ys: Ancient Ys Vanished Omen[]

  • The International version removes the code for FM Sound Unit. Adol becomes Aron or even Adoll in some instances of the script.
    • The woman in the title screen is a bit more tanned in the International version.
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