Sonic the Hedgehog (Game Gear prototype)

The 'Sonic the Hedgehog Game Gear Prototype is a prototype Game Gear ROM that served as a Press demo, a demo for game magazines to demonstrate how the game works. It is still in transitional stages from the Master System version which is evident in this version. It is a short demo of the game, only one level long.

Known Differences

Startup

• There is no Sega Logo in the beginning, just like the Master System version.
• Sonic is placed further right at level startup.
• Sonics pallette changes to a darker blue when passing the end level sign.
• A strange strip appears at the top of the level breifly, probably a glitch as touching it does nothing.
• The Invincibility stars are more similiar to the Master System version. The final game has 4 stars.
• Sonics sprite has not yet been finalized.
• The map layout is slightly different than any version.
• Game over screen is messed up due to some tile rearrangement.
• The mountain range has a similiar hue to the Master System version.