Sonic Generations (Switch) - ALL Challenge Act Gates: Modern Sonic (+ Music Notes)

[@InsertPantsHere]

I didn't get Marble Garden Zone music from Speed Highway. How did you do that?

[@JonJuju95]

After getting an S rank from each Challenge Act, ring its bell on top of the gate, and get the giant note to unlock some content.

[@noahlawlor808]

Just like the original sonic generations