The original Corpse Party game, which laid the foundation for the sequel Book of Shadows, was released first, establishing the story and gameplay style.
The sequel and expansion to the original Corpse Party, called Corpse Party: Book of Shadows, was released, further exploring the story with new chapters and scenarios.
The game was made available on the PlayStation Portable in Japan, increasing its availability to a wider audience.
The North American release of Corpse Party: Book of Shadows brought the game to a Western audience, increasing its global reach.
The curse stems from the murder of Sachiko Shinozaki in Heavenly Host Elementary School years before the main events, initiating the haunting and bloodshed in the school and the Heavenly Host realm.
A group of Saeki High School students perform a friendship ritual, causing them to be transported to the haunted Heavenly Host Elementary School realm, beginning their ordeal.
Yuka and Satoshi, characters tied to previous events, face memories and reincarnations related to the curse, deepening their connection to the Heavenly Host mystery.
Ayumi explores the school and uncovers diary entries revealing backstories of victims and the nature of the curse, thus unveiling hidden truths.
Characters experience altered realities and timelines, providing new perspectives on past events and revealing various fates of characters trapped in the curse.
The remaining survivors confront the vengeful spirit of Sachiko in a climactic struggle to break the curse and escape the Heavenly Host realm.
