This game is also available on Xbox 360, PSP and Mega Drive.
Retro Game Cheats for Sonic The Hedgehog (PlayStation 3)
Effect: Gain Free Mode!
When:
During the game!
How:
Clear all levels, boss and town missions with S rank.
Submitted By:
Effect: Unlock Shadow the Hedgehog
Effect: Unlock the "Last Episode"
When:
During the game!
How:
Beat Sonic's Episode, Shadow's Episode, and Silver's Episode
Submitted By:
Effect: Get Amy Rose in "Free Mode"
Effect: Get "Rouge the Bat" in free mode.
Effect: Get E-123 Omega in "Free Mode"
Effect: Get Knuckles the Echidna in "Free Mode"
Effect: Get the Audio Room and Theatre Room!
Effect: Get Blaze the Cat in "Free Mode"
Effect: Get Miles "Tails" Prower in "Free Mode"