Sonic CD Cheat mode
Set the following sound combinations at the “Sound Test” menu to activate the corresponding cheat function:
| Result | Sounds |
| Special levels | FM07 , PCM07 , DA07 |
| Batman Sonic scene | FM42 , PCM04 , DA21 |
| DJ MC Sonic scene | FM42 , PCM03 , DA01 |
| Freaky Sonic scene | FM44 , PCM11 , DA09 |
| Hidden scene | FM46 , PCM12 , DA25 |
| Tails “See you next game” scene | FM40 , PCM12 , DA11 |
Achievements
Accomplish the indicated achievement to get the corresponding number of Gamerscore points:
- 88 Miles per Hour (5 points): Travel through time.
- Just one hug is enough (5 points): Get a hug from Amy.
- Paradise Found (5 points): Complete a zone in the Good Future.
- Take the High Road (10 points): Pass the upper Signpost in Collision Chaos Zone 2.
- King of the Rings (10 points): Collect 200 Rings.
- Statue Saviour (10 points): Find the angel statue in Wacky Workbench.
- Heavy Metal (15 points): Defeat Metal Sonic without getting hurt.
- All Stages Clear! (15 points): Finish the game.
- Treasure Hunter (20 points): Collect all the Time Stones.
- Dr. Eggman Got Served (30 points): Destroy Dr. Eggman’s final machine.
- Just in Time! (35 points): Complete the Time Attack mode in under 25 minutes.
- Saviour of the Planet (40 points): Destroy all the robot teleporters and Metal Sonic holograms in the past.