Complete the indicated task to unlock the corresponding filter.

Filter	How to unlock
Black and White Filter	Complete all four episodes under all difficulty settings with an "S" rank.
Classic Horror Filter	Complete all four episodes in Casual mode with an "S" rank.
Comic Noir Filter	Complete all four episodes in Survival mode with an "S" rank.
Cursed Video Filter	Complete all four episodes in No Escape mode with an S-rank.
Sepia-Toned Filter	Complete all four episodes in Normal mode with an S-rank.