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Proto:Sonic the Hedgehog (Sega Master System, Game Gear)

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This page details one or more prototype versions of Sonic the Hedgehog (Sega Master System, Game Gear).
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Porting from one system to another can be tough, as can be seen with the Game Gear prototype of Sonic the Hedgehog.

Download.png Download Sonic the Hedgehog (GG Prototype)
File: Sonic 1 proto.zip (info)

Known Differences

  • There is no Sega logo in the beginning, as with the Master System version.
  • Sonic is placed further right at level startup.
  • Sonic's palette changes to a darker blue when passing the end-of-Act sign.
  • A strange strip appears at the top of the level briefly, probably a glitch as touching it does nothing.
  • The invincibility stars are more similar to the Master System version. The final game has four stars.
  • Sonic's sprite is nearly identical to the Master System version, with some minor palette alterations.
  • Various things have yet to be added to accommodate the smaller screen size, such as warning signs near pits of spikes.
  • The map layout is slightly different compared to the other versions.
  • The Game Over screen is messed up due to some tile rearrangement.
  • The mountain range has a similar hue to the Master System version.
  • Act 1 is the only playable act without hacking.
  • Using the master system level skip code it's possible to play everyother level most either crash are empty or are missing their art.
  • To play act 2 of green hill go to offset 155FE and change C4 to B6.