Unlock Maya's Costumes
Gothic Lolita Costume - Finish the game once.
Princess Peach Costume - Complete all Battle Mode missions on Nightmare Mode.
Unlock Cursed Page Mini-Games
Boy in the Book - Complete all Four Strange Masks levels (endless excluded).
Spirit House - Complete the first level of Boy in the Book.
Unlock Gothic Lolita Attire for Photo-op Mode
Beat Story Mode on Nightmare difficulty.