Quest Medley Mode randomly picks battle and field songs from the 200+ tunes in Curtain Call’s library and alternates between them. At the end of a quest there’s a boss battle. The idea for Quest Medley Mode is to give players the feeling that they’re on a quest when leveling up characters.
Theatrhythm Final Fantasy Curtain Call also has Versus Mode. When you hit notes on beat you fill up an EX Burst Gauge. When an EX Burst is triggered the other player gets a penalty like having to fight a powered up monster or a speed increase to tap notes.