SPINE: Siderius Plug's Immortality in Ninety-nine Endnotes

SPINE is a solo RPG that looks like a book. In SPINE, you play as a researcher who has inherited this strange book from an estranged relative. You play by reading the book and following the prompts that you discover in the endnotes. But you soon discover a catch. You are being absorbed by the book — getting lost in it. The only way to lessen its power is by defacing the text.

Piece together the story without losing yourself in it. 

Content Warning 

Inside, you may encounter possession, loss of bodily control, and child abuse (verbal, manipulative). If you experience unexpectedly strong emotions that are painful or that surface past trauma, stop playing immediately and connect with someone you trust.