Sonic CD Level select
At the title screen, press [Up], [Down], [Down], [Left], [Right], [Space]. Note: Only a single level may be completed with this feature enabled.
Cheat Codes
At the title screen, press [Down], [Down], [Down], [Left], [Right], [Space] to enable the sound test screen and chat mode. Then, enter and play one of the corresponding sound combinations to activate the corresponding cheat function:
| Result | Cheat Code |
| Debug mode | PCM12 , DA11 |
| Bonus levels | PCM07 , DA07 |
| Human-faced Sonic | PCM12 , DA25 |
| Hercules Sonic | PCM04 , DA21 |
| Display artwork | PCM03 , DA01 |
| “Revenge of the Mutant Artwork” | PCM11 , DA09 |