Tanuki Games

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

SPINE RPG: Siderius Plug's Immortality in Ninety-nine Endnotes - Main image
$10.53 $16.99 In stock

Category: Role Playing Games

2025 Indie Groundbreaker for Most Innovative
2025 Indie Groundbreaker nominee for Best Writing
2025 Indie Groundbreaker nominee for Game of the Year

2026 Gold ENnie for Best Solo Game

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.

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Customer Reviews (5.0 / 5 · 2 reviews)

Mia S. ★★★★★

I've been playing solo RPGs for years, and the way SPINE uses 99 numbered endnotes to build its story is unlike anything else I've tried—it makes each session feel like uncovering a secret manuscript. The 2025 Indie Groundbreaker for Most Innovative award is well-deserved; the system genuinely rewar

Miles ★★★★★

The way the rules unfold through 99 endnotes creates such a satisfying puzzle, and the solo play feels genuinely fresh. I’ve been thinking about that "Immortality" theme for days after finishing.