Auto-cannibalism. Demonic Seduction. Occult Rituals. Bloodfeasting Worms. This Book Is A Dungeon has it all and more. This dark, horrific Twine-based dungeon crawler pairs edgy interactive fiction with grisly pixel art and light RPG elements. Prepare to be disturbed, titillated, and savaged by unholy denizens aplenty in your quest to navigate this sprawling narrative-driven labyrinth bristling with otherworldly doom.
Warning: this game will kill you. often.
Part of the intended challenge is in experimenting to see where different paths and choices lead you. It's impossible to experience all of the content in a single runthrough. Experiment, be bold, and uncover your fate, wherever it may lead!
Features:
Experience a grim story-driven horror adventure
Solve cryptic and disturbing puzzles
Die in dozens of horrible ways
Enjoy light RPG elements, including combat and inventory
Discover multiple endings
BONUS: 40,000 word game dev diary
This game is not for the squeamish or faint of heart.
Bonus game dev diary ebook
This Book Is A Dungeon was originally created as an interactive fiction and self-publishing experiment. It was initially launched as a game inside a Kindle book that served as a developer diary documenting the entire process for creating the game from start to finish. As part of the Steam Edition, you can access a free download link for a PDF version of the dev diary within the main menu.
windows Minimum
OS: Windows XP Service Pack 2+
Processor: Intel Pentium 4 or later
Memory: 512 MB RAM MB RAM
To activate the game, you need a Steam Account
Login or register at the official Steam Website and download Steam client
Install and start application, login with your Account name and Password
Click the Games Menu.
Choose Activate a Product on Steam...
Follow the onscreen instructions to complete the process
After the successful code verification, go to the "MY GAMES" tab and start downloading.
News & Updates
2025-12-12
Earn More YXP and Unlock New Levels with YUPLAY
We are constantly working on new ways to reward our community and provide added value to everyone who chooses YUPLAY as their go-to destination for gaming content. Our most dedicated users deserve something special, which is why we’re excited to introduce the YUPLAY Loyalty Program.
To celebrate its launch, we’ve prepared an exclusive promotional event that gives you the opportunity to earn 50 YXP, helping you progress faster and improve your chances of unlocking higher loyalty levels.
Dive Into 2025’s Most Addictive Video Games – Part 1
It is already the month of December and 2025 is nearly done, however there have been some great titles all throughout the year and we decided to make a definitive list for some of the most addictive video games we got during the year! We separated it into 2 dozens of Steam games in almost all of the main gaming genres, so there should be something for everyone to enjoy on it! We hope you like it and let’s directly dive right in the action with the first part of our list!