This Book Is A Dungeon is a dark, Twine-based dungeon crawler that combines interactive fiction, grisly pixel art and light role-playing elements. Its premise is a sprawling narrative labyrinth steeped in occult horror, where the player navigates disturbing encounters and tries to uncover a fate shaped by their decisions. The game’s deliberately transgressive imagery and themes make it a distinctly bleak adventure rather than a conventional fantasy crawl.
Progress depends on experimentation: choices lead along different paths, and the game encourages players to find out where those decisions go. Cryptic puzzles, combat and an inventory add hands-on challenges to the story, while repeated deaths are part of the stated difficulty. Multiple endings reward exploring divergent outcomes, and the source notes that a single playthrough cannot reveal all the content. The result is a narrative-led format built around branching choices and grim consequences, not simply a fixed sequence of dungeon rooms.
The Steam edition also includes access to a PDF developer diary, reflecting the project’s origins as an interactive-fiction and self-publishing experiment. Together, its solo format, choice-driven structure and horror presentation define the kind of experience represented by its player activity.
