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 (265) - 91% of the 265 user reviews in the last 30 days are positive.
All Reviews:
Very Positive (4,981) - 93% of the 4,981 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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Recent updates View all (57)

February 13

Online Battles event summary!

Online Battles timed event has ended on schedule and we would like to take a moment to sum it up.

First of all: it worked! This was not granted as it was a very experimental networking code, something we never did before. Besides some matchmaking issues, the mode ran smoothly, which we count as a success. We also gathered a lot of useful data on network loads and general multiplayer design. Both will come in handy when working on future games in the Return 2 Games series.

While the scoring, like the whole event, was experimental and should be taken with a pinch of salt the results are in!

Over 1000 players competed with three players getting ahead of the pack:
  • kenzos75 with 15 won matches and only one match lost,
  • Lokken with 10 matches won and
  • our teammate Wiedźma Danaien who, to our surprise, played the mode a lot and won 7 battles.
Congratulations everyone, it was fun! And in case you were wondering why so many hearts for the header animation for this news: Happy Valentine's Day everyone! :paperheart: :paperheart: :paperheart:

Stay safe in paper dungeons :archduck:
4 comments Read more

February 6

Online Battles timed event is live!

One recurring request during Early Access was to add multiplayer to the game. We researched that and experimented but in the end, it became obvious we can't do it without rewriting the game from scratch. However, while experimenting we came up with a multiplayer competitive mode that works and we had a surprising amount of fun playing it.

We decided to share this experiment with you. So, without further ado, we present...

Online Battles

What are Online Battles? It's a timed event that will run for a week starting now. Two players are matched together. Both competing heroes share the same class, same random cards, and the same dungeon.

After initial 20 seconds for picking a hand out of random cards, the battle begins. Each time a player slays a monster, a shadow of this monster will spawn in opponent's dungeon. Shadows are tinted red and while they can deal damage and be killed they don't count against total monsters count. Whoever kills all the enemies (excluding shadows spawned by the opponent) wins! There is no way to interact with the other player besides throwing your defeated enemies at him. Watch your opponents moves, time your kills well to throw a wrench in his plans. Two men enter, one man leaves :paperdeath:

Why? For fun and science!

It's very important to stress that this is not a completely finished product. It's more of an experiment we put together and are sharing after hewing the roughest of edges. This is our first attempt at multiplayer so we hope it will work reasonably well and you will have fun with it.

We would love to include multiplayer in all future games and we are looking forward to learning a lot from this experiment.

Looking forward to hearing your thoughts and feedback.

Changelog for version 1.00.18019
  • Experimental Online Battles mode
  • Fixed walking in the dungeon using WASD keys not working when mouse cursor was over the lower bar
  • Fixed issue when the player could walk in the dungeon with stats window open
  • Fixed card Relic of Rage showing incorrect initial trigger value
  • Disenchanting currently not equipped card variant won't switch the current variant to common while resetting charges to zero anymore
  • Fixed issue when crosscut was scrolling simultaneously with opened frame scrollbar
  • Fixed typos in multiple translations

As always,
Stay safe in the paper dungeons (and slay faster than the other guy) :paperheart:
15 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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