This game is also available on PS2.
Retro Game Cheats for Sonic Gems Collection (Gamecube)
Effect: Unlocks "Sonic CD Artwork Set 2" in the museum.
Effect: Unlocks "Sonic DX artwork set 5" in the Museum section.
Effect: Unlocks "Sonic R Artwork Set 3" in the Museum section.
Effect: Unlocks "Sonic R Artwork Set 4" in the Museum section.
Effect: Sonic CD - "Sonic Team's" best times
When:
At the "Start Game" screen
How:
At the start game screen tap (do not hold) on the D-pad: Up, Right, Right, Up, Up, Down, A.
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Effect: Get an image of superhero sonic!
When:
During the Sound Test mode
How:
Enter this code: PM 04 DA 21, into the sound test menu and you'll get a picture of superhero sonic.
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Effect: Unlock extra games, Vectorman
When:
N/A
How:
Play the Gems collection for a total of five hours (you have to save for the time to be logged.) Alternatively have a Sonic Mega Collection or Sonic heroes save file on your memory card and that will also unlock the game, Vectorman.
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Effect: Unlocks "Chaotix artwork set 2" in the museum.
Effect: Unlocks "Sonic The Fighters Artwork Set 4" in the museum.
Effect: Unlocks "Sonic R Artwork Set 2" in the Museum section.
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