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 (67) - 89% of the 67 user reviews in the last 30 days are positive.
All Reviews:
Very Positive (5,396) - 92% of the 5,396 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 (62)

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:
8 comments Read more

May 13

Book of Demons' prototype added to Collectors' Content DLC!

Game developers don't share their early working concepts of games - the prototypes - often. When they do it's usually super interesting to see how the game changed and get a glimpse into the creation process. That's why we would like to share the earliest prototype with collectors.

In game development, prototypes serve many purposes but most importantly they are used to test if the core gameplay is fun. Usually, the first prototypes are not even computer games but rather tabletop games quickly put together with pieces of paper and a set of dice. Prototypes don't have to look good either - it's even better if they are not great looking as you can focus on how fun they are that way.

Book of Demons' prototype

Our prototype took a month to put together. When compared to years it took to make the finished and polished game it gives a good idea of how much work separates an idea from the finished game.

We wanted to be very thorough when making a prototype so we made sure it's as complete experience as possible. That's why you will find that the prototype plays almost until the Archdemon. As a neat bonus, you can get a glimpse into how we initially imagined the cards. You will find some of them echo similarly to what ended in the finished game, while others will be... different.

Important note: only Warrior has cards in the prototype. Both other classes are present and playable but without cards. Warrior's set was all we needed to prove the concept.

The Flexiscope is present in its basic form. Balance is *very* rudimentary so don't expect the prototype to hold your hand. While the rng gods might time at you there is a considerable chance you will get killed. A lot.

Unless you like to experiment that is. There are developer shortcuts in the prototype that grant superpowers.

There are possibly also bugs, some of them exploitable, waiting to be discovered. The boss fight at the end of the game is metaphorical: the game crashes. We like to think it conveys the futility of eternal fight of light versus darkness. Also, we had no use for the boss fight in the demo :archduck:

Ah, and one more thing. There is no duck in the prototype. Really, can you believe it wasn't a core character in the beginning? A poignant realization, it would be a sad world without it :archduck:

How can I access the prototype?

All of you who own Collector's Content or Supporters' Bundle will gain access to the prototype immediately. For those of you who would like to check it out but don't own the Collector's Content pack, we are putting it on a 50% sale now so you can grab it on the cheap.

To run the prototype just go to the Book of Demons' files where you can now find a new folder called Prototype. Just enter it and double click the executable file.

Here is a short step by step guide how to get to the Book of Demons' files:
  • Go to your Steam Library (list of your games)
  • Select Book of Demos and make sure Steam uploaded the Collector's Content DLC (see the image)

  • RMB-click on the Book of Demons
  • Select Properties
  • In the window that pops-up select Local Files tab
  • Press Browse Local Files button
  • Go to Prototype folder and double click Prototype.exe

Where can I find more info about the game development?

Some time ago Matthew wrote a couple of blog posts and did interviews about Book of Demons' creation process. If you are interested in how the game was made, get a cup of tea and make yourself comfortable:

Official Discord Channel

And if you would like to know more we are on Discord and we are running Ask Us Anything channel for the curious :archduck:

Here is the invite link:

Stay safe in the almost-paper-like-prototype dungeons! :archduck:

Margaret :paperheart:
3 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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