Book of Demons is a Hack & Slash Deck-building hybrid in which YOU decide the length of quests. Wield magic cards instead of weapons and slay the armies of darkness in the dungeons below the Old Cathedral. Save the terror-stricken Paperverse from the clutches of the Archdemon himself!
Recent Reviews:
Very Positive (103) - 87% of the 103 user reviews in the last 30 days are positive.
All Reviews:
Very Positive (5,834) - 92% of the 5,834 user reviews for this game are positive.
Release Date:
Dec 13, 2018

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Important: If you already have Book of Demons in your library and want to upgrade to the Supporter’s Pack version, please purchase the Book of Demons to Supporter's Pack Upgrade Bundle.

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Includes 2 items: Return 2 Games Supporter Pack, Book of Demons


Recent updates View all (65)

July 24

🔥UPDATE🔥Mini-challenge mode!

Cunning rogues! Mighty mages! Hardened warriors! The time has come for a new (mini)challenge! Behold: The Mini-challenge Mode!

What is this mode all about?

This mode is aimed for anyone who seeks some more challenging gameplay, competition, is willing to prove themselves in unusual circumstances and, well, enjoys a challenge :archduck: (pun intended). Your goal is simple: gain as many points as you can and gain fame among other brave souls!

The deets

Mini-challenges are short levels in which the players compete in the same conditions for the best score. They will take place in predefined dungeons, you will play with a premade character, cards, and a certain set of rules. TL:DR: we give you a character, rules, a set of cards and a dungeon and send you on your way for the best score.

Each challenge will have a set of rules modifiers. For example, spells cooldown will be getting longer with each use. Or monsters moving with super speed., etc. Scoring will also vary between challenges. Sometimes the gold will be most important and sometimes the speed will be of the essence. And sometimes there will be no light in the dungeons at all. Good luck with that one! :paperdeath:

Please note that everything in the challenges will be predefined, including the character. In order to participate in the challenges, you have to reach the 10th level with the featured one. So if a challenge is made for mages, but you played only with a warrior so far - you need to reach the 10th level with a mage in the normal game mode in order to be able to try that challenge. This ensures that participants know the basic gameplay with said character.

From now on new challenges will be switched 3 times per week - every Monday, Wednesday, and Friday (this means that weekend challenge lasts 3 days while weekday challenges last 2 days).

Oh, one more thing: while playing a challenge, cards, HP/mana/scrolls do not drop in the dungeons, the cauldron is always empty, and Death Rage is disabled. :archduck:

Leaderboards and scoring

The challenges will have their own leaderboards. The higher the score, the higher your position on it.

Following scoring applies, unless changed by modifiers:
  • 1 pt for every coin looted
  • 10 pt for every heart of the enemy that you destroy
  • 250 pt for every boss stage completed
  • 500 pt for every boss killed
  • -20 pt for each second spent in the dungeon
  • -750pt for every death (unless death cancels the challenge)

Spending gold or selling runes does not decrease the score already awarded for picking that gold, so sometimes it may be worth to hop to town for quick heal and card upgrading.

To finish a challenge and send your score to the leaderboard you have to click on the Complete button. The button becomes clickable when you click on the stairs down in the last level of the challenge - no need to clear all the levels! You can always abandon the challenge via a menu that opens after pressing ESC or with the X button next to button Complete. However, abandoning or failing the challenge (some modifiers add special fail conditions) does not save your score on the leaderboard. You can retry challenge for a better score as many times as you want for as long as it’s available.


Hit us up on Discord or simply come to hang out! (Write us there if you have any issues with the game too:archduck:)

Full Changelog

Version 1.03.18721 24th July 2019
  • Challenge mode!
  • Updated translations
  • Fixed pad support in card variant selection window
  • Improved pad performance on low framerates
  • Modified supporter registration window
  • Changed Whetstone charge cost from 1000/3000/5000 to reasonable 750/1200/1500

Stay safe in paper dungeons :archduck:


21 comments Read more

June 5

Introducing Card Sets!

Have you ever found yourself wishing you could swap your hand for another build in the middle of a fight? Ever wished to be able to have two builds and quickly swap between them? If you answered yes to any of those questions, this update is for you. Introducing: Card Sets!

So... what are Card Sets exactly?

From now on you can have two hands of cards. Only one is equipped at a time but you can switch between them quickly without opening inventory.

This means you can now have two specialized builds and adapt faster. Passive vs aggressive build. Fire vs ice. Ranged vs. Close And Personal™! It all depends on your play style and creativity, so don't be afraid to experiment!

How do I access them?

You can use them from the very beginning of the game. The feature is accessible starting from level one on all game modes. In order to swap your cards use the button to the left from mana orb, press G (default) on your keyboard or hold D-pad up on your controller. The number on the button shows which set is active. There is no cooldown.


Come join our Discord channel and let's chat!

Changelog Version 1.02.18360 4th June 2019
  • Card sets
  • Fixed disenchantment granting unidentified card that cannot be identified
  • Fixed showing incorrect progress of "Bronze division" achievement in Awards window
  • Added supporters to to credits
  • Updated translations

Stay safe in paper dungeons! :archduck:
Agnes :paperheart:
9 comments Read more


“Nostalgia without disappointments, frustrations and huge time investments - that’s the ambitious goal of Book of Demons, at once a parody and a tribute to the original Diablo, made in cute paper cut-out graphics.”
Rock Paper Shotgun

“Book of Demons aims to fuse the strategy and depth of Diablo with the style and charm of Paper Mario by using a unique movement and combat system, more accessible action-RPG mechanics, and a fair dose of humor intertwined with its dark theme.”
Game Informer

“Book of Demons is bound to entice newcomers to the genre as well as a long time action RPG fans who have been longing for a different kind of dungeon crawler.”


About the Supporter's Pack

To learn more about the Supporter’s Pack click here.

If you already have Book of Demons in your library and want to upgrade to the Supporter’s Pack version, please purchase the Book of Demons to Supporter's Pack Upgrade. This product only works for owners of the game. If you wish to support us and buy the game and Supporter’s Pack as one, please purchase the Return 2 Games Supporter Pack.


Want to try Book of Demons without any commitment? Click here to try the free Demo.

About This Game

Book of Demons is a Hack & Slash Deck-building hybrid in which YOU decide the length of quests. Wield magic cards instead of weapons and slay the armies of darkness in the dungeons below the Old Cathedral. Save the terror-stricken Paperverse from the clutches of the Archdemon himself!

Procedurally Generated Dungeons
Roguelike Mode for fans of extreme challenge
70+ different types of monsters, with different traits and custom mechanics
Xbox and Steam controller support
Dungeons & Streamers - Twitch and Mixer integration
Monthly and all-time Leaderboards, 200+ Achievements

Book of Demons is the first installment of Return 2 Games - a series of original mid-core titles, inspired by the early golden days of PC gaming.

Cards and Deckbuilding

It’s not a card game, but items, spells, and skills are all expressed as cards. The strategy lies in adapting your hand to each situation. Cards can be upgraded with runes and you can find many variants with diverse bonuses. Legendaries are the most epic but hard to acquire.

Tailored sessions with Flexiscope

Book of Demons respects your time. It features the Flexiscope engine which allows you to divide the game into sessions of any size. It even learns your pace of gaming and predicts the time to complete the next session.

Unique Mechanics

Simplified movement and fight mechanics is where Book of Demons differs the most from other hack & slash games. There is often not enough time to click-remove all of the obstacles such as monster shields, enemy spells, poison, or knocked cards, so timing, card selection and order of execution are critical.

Hack & Slash in the world of Paperverse

Book of Demons takes place in Paperverse, a world that exists entirely inside a pop-up book.
It’s a tale of good and evil about saving the world from the ultimate devilry. Sounds familiar? Inspired by the dark and gloomy atmosphere of the first Diablo game, Book of Demons is part tribute part parody of hack & slash classics.

Comfort of Gameplay

Many Book of Demons features were designed with gameplay comfort in mind. Points of interest are marked at the top of the screen and get revealed once you get closer. Your character leaves footprints, which can be used to track your way back or notice paths already visited without opening the map.

Challenging Endgame

On average it takes about 10 hours to complete the campaign with a single class, but maxing out a character and mastering all of the higher Freeplay difficulty levels and Quests takes much longer. The Roguelike mode offers another level of challenge with permadeath, restricted healing and even more obstacles to overcome.

Dungeons & Streamers

System Requirements

Mac OS X
    • OS: Windows 7, 8, 8.1, 10
    • Processor: 1.7 GHz Dual Core or Greater
    • Memory: 2 GB RAM
    • Graphics: 512 MB DirectX 9.0c compatible graphics card
    • DirectX: Version 9.0c
    • Storage: 1 GB available space
    • Sound Card: DirectX 9.0c compatible
    • OS: OSX 10.12+
    • Memory: 2 GB RAM
    • Graphics: Open GL 3.3+ Compliant
    • Storage: 1 GB available space

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