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Sonic the Hedgehog

Sega Genesis

Game Description:

Sonic the Hedgehog is an action platformer game for the Sega Genesis.

Translation Description:

Portuguese translation of Sonic the Hedgehog for the Genesis/Mega Drive. It was made with the GitHub disassembly of the game. Zone names were taken from the official Brazilian manual by Tectoy.

The translation also:

  • Fixes the title screen emblem being off-center horizontally.
  • Restores the “PRESS START BUTTON” text to the title screen.
  • Fixes the time counter not blinking at the 9th minute if you have rings.
  • Fixes the hidden 100 point object giving only 10 points when touching it.
  • Fixes the crash that happens when you pan the camera down at the end of Labyrinth acts 1 and 2.
  • Skips the checksum check making the game start slightly faster.


  • In Marble Zone, the results screen makes the signpost and capsule flicker due to the game hitting the limit of 80 onscreen sprites.
  • The ROM will be expanded to 1 MB, because during development of this translation, the ROM ended up getting larger in size than the vanilla game.

ROM / ISO Information:

  • Database match: Sonic The Hedgehog (Japan, Korea)
  • Database: No-Intro: Genesis (v. 20180824-045026)
  • File/ROM SHA-1: 69E102855D4389C3FD1A8F3DC7D193F8EEE5FE5B
  • File/ROM CRC32: AFE05EEE


Screenshots: Patch Patch Patch Patch Images


ContributorType of contributionListed credit
Green JerryHackingFull Hacking & Translation to Portuguese

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