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A blue hedgehog with supersonic speed must rescue animals from being turned into robots by a mad scientist.

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The 8-bit version of Sonic the Hedgehog for the Master System and Game Gear. Its plot and gameplay mechanics are similar to the Mega Drive version, though some level themes are different ... See full summary »

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Sonic and Tails must collect the Chaos Emeralds before Eggman can use them to power an angry water creature known as Chaos. Meanwhile Knuckles attempts to repair the shattered Master Emerald and Amy must evade capture from an Eggman robot

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Doctor Robotnik is an evil and mad scientist who only had one destiny, taking over the whole world and to do this he needs to collect all six chaos emeralds which are located on the South Island. So Robotnik goes to the South Island and turns all animals there into robot slaves. Who will stop this madness! Well, sonic the hedgehog of course. sonic is a blue hedgehog that can run at the speed of sound. When sonic hears what Robotnik is doing he needs to stop him but Robotnik turned all the animals into robots. So sonic needs to free all his friends to collect all the chaos emeralds before Robotnik does and defeat him and bring peace into a South Island again.

Plot Summary | Add Synopsis


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Official Sites:

Sega | Sega - Sonic Central | See more »


Japan | USA


English | Japanese

Release Date:

23 June 1991 (USA) See more »

Also Known As:

Sonic the Hedgehog See more »

Company Credits

Production Co:

Sonic Team See more »
Show more on IMDbPro »

Technical Specs



Aspect Ratio:

1.78 : 1
See full technical specs »

Did You Know?


The background to Spring Yard Zone originally featured skyscrapers with horizontal-colored bars instead of the mountains, city, and trees in the final background. See more »

Crazy Credits

The ending credits vary depending on how many Chaos Emeralds you collected throughout the game:
  • If you collected all 7 Emeralds, at the end Dr Robotnik will be seen jumping angrily on "THE END."
  • If you didn't collect them all, Robotnik will be happily juggling the Emeralds you missed over the words "TRY AGAIN."
See more »

Alternate Versions

In the late 1980s/early 1990s, Sega of Europe released a modified version of the Master System and Mega Drive hardware for use in arcades. This multi-cart system was known as Mega-Tech, and the JAMMA version (Mega Drive only) as Mega Play. This machine could host up to eight cartridges at once, meaning the arcade-player could choose any one of eight games to play; both 'Sonic the Hedgehog (1991) (VG)' and 'Sonic the Hedgehog 2 (1992) (VG)' were amongst these games. Other than many notable differences, this version of Sonic 1 was identical to its European Mega Drive counterpart other than the ever-present countdown restricting your play time; you get an additional 3 minutes for each coin you insert. The Mega Play version has a few differences: it's based on the Japanese version of the game, complete with scrolling clouds (see above); the timer counts backward instead of forward, with rather strict limits for each stage (fortunately, if you die and touched a Start Marker, you'll begin at the Start Marker with a reset countdown); any extra lives collected are ineffective (if you want to continue your game, you need a pocket full of quarters); there are only four Zones to play (Green Hill, Spring Yard, Star Light, and Scrap Brain, the lattermost of which is missing its final Act); there are no Special Stages (even if you jump into the giant Ring at the end of an Act, you'll just start the next Act as usual); and finally, there's no credit roll - instead, once you complete the game you are asked to enter your initials on a high score screen. See more »


Referenced in Honest Game Trailers: Evolve (2015) See more »

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User Reviews

Need Only One Button!
10 June 2005 | by hadjiquest79See all my reviews

I have this game for my Sega Genesis. Plug the cassette in and the choir sings "SEGA!" That part was so cool. I love this game. Sonic looked so cute in his old style. Yuji Naka created the adorable and cute and speedy little hedgehog sporting sneakers. I love the Green Hill Zone theme. Sonic really put Sega on the map. His arch nemesis is a scientist who kidnapped animals and robotized them. The Scientist's name is Dr. Eggman. Every time you defeat Dr. Eggman, he gets away. You have got to find all six Chaos Emeralds and put an end to Eggman's conundrums. Sonic is much faster then Speedy Gonzalez and cuter than an Italian plumber.

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