| Unlockable: | How to Unlock: |
| Audio Room | Complete Sonic, Shadow, or Silver's story 100% |
| Free Mode: Amy Rose | All "S" Ranks on Soleanna mystery missions. |
| Free Mode: Blaze the Cat | Pass all Soleanna mystery missions. |
| Free Mode: E-123 Omega | All "S" Ranks on GUN Commander missions. |
| Free Mode: Knuckles the Echidna | All "S" Ranks on Town Stage missions. |
| Free Mode: Miles "Tails" Prower | Pass all Town Stage missions. |
| Free Mode: Rouge the Bat | Pass all GUN Commander missions. |
| Last Episode | Beat Sonic's Episode, Shadow's Episode, and Silver's Episode |
| Shadow the Hedgehog | Complete 'Crisis City' with Sonic |
| Silver the Hedgehog | Complete 'Silver the Hedgehog' boss battle with Sonic |
| Theater Room | Complete Sonic, Shadow, or Silver's story 100% |
