Retro Game Cheats for Sonic The Hedgehog (Mega Drive)
Effect: Unlocks all levels.
When:
During the sonic start up screen.
How:
Up, down, left, right, a-start.
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Effect: invincible sonic
When:
At title screen
How:
Press up up c down down c left left c right right c then hold a and press up down left right when a you hear ring sound press and hold start.
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