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: