There are 13 chapters in Fatal Frame IV: Mask of the Lunar Eclipse.
Chapters[]
Prelude: Blossoming
Playable Character: Madoka
Phase I: The Summoning
Playable Character: Ruka
Phase II: Resonance
Playable Character: Misaki
Phase III: Lost Day
Playable Character: Choshiro
Phase IV: Void
Playable Character: Ruka
Phase V: Twin Faces
Playable Character: Misaki
Phase VI: Moonsong
Playable Character: Ruka
Phase VII: Tranquility
Playable Character: Choshiro
Phase VIII: Sakuya
Playable Character: Misaki
Phase IX: Descent
Playable Character: Ruka
Phase X: Fallen Petals
Playable Character: Choshiro
Phase XI: Eclipse
Playable Character: Ruka
Final Phase: Hallowed Realm
Playable Character: Ruka