Hack & slash distilled to its purest form. Devilishly charming and fun as hell. Slay the armies of darkness in the dungeons below the Old Cathedral and save the terror-stricken Paperverse from the clutches of the Archdemon himself.
User reviews:
Very Positive (43 reviews) - 97% of the 43 user reviews in the last 30 days are positive.
Very Positive (400 reviews) - 94% of the 400 user reviews for this game are positive.
Release Date: Jul 28, 2016

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“Book of Demons has been in development for roughly 3 years, and since all the core features are already in place, we’re now at a point where we need feedback from our players: your feedback! We have lots of ideas about how to enhance the game, but we need help deciding on priorities.”

Approximately how long will this game be in Early Access?

“This will depend on the feedback from the community, but basing on the current state of the game we hope to be ready for final release at the end of this year, or at the begiining of 2017.”

How is the full version planned to differ from the Early Access version?

“In the full version of Book of Demons, the player will be able to choose between 3 character classes (currently two classes are playable) all with unique class skills, will encounter more kinds of enemies while exploring the dungeons, and will have the option to master quests on higher difficulty levels. Apart from this, we will be constantly polishing, balancing and fixing the game. We also have some ideas for new major features (such as a level editor) that we would love to add, but these will depend on how smoothly finishing the game will go.”

What is the current state of the Early Access version?

“The day one features of the Early Access version include all the core mechanics, the whole single-player campaign, and the Freeplay mode. It lacks some of the content like Rogue character class, some skill cards or enemies. And a lot of sounds.”

Will the game be priced differently during and after Early Access?

“We don't plan on changing the game price after leaving Early Access.”

How are you planning on involving the Community in your development process?

“We have added a special feedback widget to the game, so any player can send feedback any time while playing. Apart from this we frequently communicate through Twitter, Facebook and we plan to communicate even more through our Steam Community Hub, videos and development blog, to keep the players up to date. Our community is incredibly important to us and we will consider all feedback provided; please keep in mind, it will not always be possible for us to implement all suggestions or to respond to every comment individually.”
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Recent updates View all (25)

April 1

The other side of the story

We had a long talk about the core concepts of our game and we agree that portraying Town dwellers as the heroes paints an unjust and skewed image of the whole story.

It was humans who first dug the maze under the Cathedral. When viewed from this point it's obvious that the undead and demonic hordes are simply defending their homes! Maybe sometimes overzealously, true, but how can blame them?

Besides, who doesn't love the underdog? Science seems to back us up on that one

That's why we decided to retell the story in Book of Demons. Once we are done the only available class will be the Skeleton.


You will get an opportunity to fight the onslaught of so-called heroes who invade your warm and cozy Hell. Repel the invaders, fight all the way up to the Town. Raze it to the ground in the name of the Archdemon!

Obviously, Warrior, Mage and Rogue classes will become unplayable once the update rolls out. However, since we don't want to wipe your progress the human mobs in dungeons will retain skills and levels of your current characters.

New cards will have to be introduced to help you in your quest. Skeleton's signature cards will include:
  • “Awkward Boner” - summons a huge but clumsy skeletal minion
  • “Genesis” - conjures a female skeleton companion at a cost of a rib (usable up to twelve times)
  • “Cardboard Barrel” - hide your skeleton in a paper barrel so he can surprise enemies!

The changes in the game should not come as a total surprise as many hints were in place from the very start. For example, during the final showdown, Archdemon states: “Let’s consider who is really evil here. Did I break into your home to destroy you? I have a circle in hell reserved just for you!”

All glory to the Archdemon! Fight for your dungeon!

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March 15

Legendary Update!

The wait is over! The card system update is finally here. I will try and break down the main changes. Buckle up.

All is common now

The first thing you will notice is that all your cards are now of common rarity. Yes, you read that right, the old common/rare/legend system has flown out of the window. All cards you knew are now common. Additionally, all unidentified cards you might have had before the patch will be identified at no cost, you will find then in your inventory after starting the game.

Pave way for Card Variants
From now on every card can be found in multiple variants. The common rarity has to be found first. After that, there is a small chance that a rare more powerful variant will drop.

There are two variant rarities: Magical and Legendary. Each rarity has modified icon and card template. Magical and Legendary cards use silver and golden templates respectively. Those used to indicate card level, which now will be indicated with stars on the left side of the template and card icon.

Magical variants

Each Magical variant will have one special effect. The effects vary between card types (Artifacts can have different effects than Items or Spells). He are example additional effects:
  • Mighty Blow of Tsunami - the Tsunami variant will cause all shockwaves generated by the player to be bigger. Effect does stack.

  • Left-winged Mana Potion - the Left-wing variant secures the card to the left of it and that card can't be cursed by a boss! However, if this variant gets cursed and disabled the protection expires. So if you have that one crucial card that must be protected against curses better find the Right-wing variant as well!

  • Lavender Boots - Lavender artifacts increase hit chance against spiders (did you know that placing lavender in your room scares spiders aways? True story!)
Legendary variants

Each card has at least one legendary variant with a very low drop rate (and guaranteed drop from a Quest Boss, making the quest mastering a potentially profitable activity. Once it's added to the game, that is).

There are rumors about a legendary Hourglass card that has the power to prevent caster’s death when active. In the event of death it is supposed to be able to reset health and mana to levels from the moment of casting. And it is also said to reset him back in space to the spot he was standing at the time of casting.

Then there are stories of a legendary amulet that damages monsters standing near to a picked up health globe and self-replicating chain ice bolts. Surely most of them are just exaggerated nonsense and hearsay. Then again we have the dead swarming up from under the cathedral and no one believed that could happen either. So who knows.

Upgrading and Downgrading
Each card variant has to be upgraded separately. Some variants' effects improve with card levels, other's don't.

Since this means a lot more occasions for upgrading more rune cards will be dropping in dungeons and we also introduced card downgrading. Each downgrade costs gold and returns random rune cards. Two rune cards for downgrading a Magical and three for a Legendary card. This means that if you are lucky when downgrading you might get better rune cards than the ones you invested into the upgrade!

So how does all that work?

Once you find a variant of a common card, a stack of cards will appear under it in the Card Pane. Since each card now has only one active variant, the variant you see on top is the active one. You can change it using a small button that will appear near the bottom of the card.

How does this mesh with other mechanics? When the card is cursed or disabled in another way all variants are affected. When the card is in tombstone all variants end in that tombstone. However, when the card is destroyed on higher difficulties, only the active variant is destroyed.

Mana Burn mechanic

Until now standing in fire boiled and depleted mana pool over time. Since no one needs additional encouragement not to stand in the flames we modified this mechanic. Now Mana Burn is a special Demons’ skill on Hell tileset. Whenever demons hits you a flame is struck under the mana pool. When there are three flames each consecutive attack from a demon burns one mana point. Of course, flames under mana pool eventually die out, the trick is not to get hit by demons multiple times in a short period of time.

The most important aspect of this revised mechanic is that even the green mana is affected by it. This means that damage coming from demons can disable your equipped artifacts! As the mana level drops artifacts on the right will be mana starved first. Once you replenish your mana they will automatically activate again.

This means that now order in which you equip artifacts matters on hell tilesets and demons will be more challenging there, too. You have been warned, watch your mana pool.

Improved Cauldron

It was long in the making but we have also redone how the cauldron works. Before every three rewards of one type were converted to one reward of a higher tier. It was confusing since it was not obvious if that silver reward will be better than three bronze ones.

That’s why now for every three rewards of the same type one reward of the higher tier will be added but the three rewards stay in the cauldron! This means way more rewards with each cauldron buyout!

Other stuff
Of course beside the big things listed above we added a ton of stability improvements, bug fixes and general polishing like autumn leaves in the town. You can read full changelog in the game and in the forums.

What's ahead?
This is a big update that includes refactoring of many core system and game logic. We expect to be working on balancing and general bug fixes during the next week. Keep the reports coming in!

Once things settle we will begin work on the Rogue. The careful estimate for Rogue’s release date is one and half month from now. She is already implemented but in the light of recent changes to the card system and all the polishing and tweaks we did to the other to classes we believe some of her cards can be more awesome.

This update was not initially planned but once the idea of adding more variety to card system came up during the early access we knew it has to be done. Now that it’s behind us we reevaluated the production and marketing plan and it looks like the launch will happen in Q3 2017.

Stay safe in the dungeons


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“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.”

Not convinced? Try the free demo!

Warrior / Rogue / Mage Gameplay Preview

About This Game

Book of Demons is hack & slash distilled to its purest form. Devilishly charming and fun as hell. Slay the armies of darkness in the dungeons below the Old Cathedral and save the terror-stricken Paperverse from the clutches of the Archdemon himself. The game is the first installment of Return 2 Games - a series of original mid-core titles, inspired by the early golden days of PC gaming.

Decide the length of quests!

Have only 5 minutes for a game? No problem! Book of Demons allows you to set the length of each quest, thanks to our Flexiscope™ system. It learns your way of playing and gives you the best experience, making Book of Demons the first truly accessible hack & slash!

Build your own deck of devastating skills!

Collect powerful skill cards, combine them depending on the enemies you're facing and assemble your favorite set of devastating powers! But be warned: efficiency of each card will greatly depend on the situation you're in, so be prepared to make constant adjustments!

Relive the classic with a good laugh!

Book of Demons is a universal tale of good and evil about saving the world from total destruction and ultimate devilry! Sounds familiar? Well, how about retelling the story in a different way, with a humorous twist of a parody?

Be a part of a one-of-a-kind adventure!

Never explore the same dungeon twice - in Book of Demons every level is a procedurally generated, randomly-populated adventure of its own! You won't get bored by the diversity of monsters either - there are over 70 kinds of creatures waiting to be slain: lurking scorpions, snake archers, mad goatmen, not-so-sexy succubi... you get the idea.

Hack & slash in the world of Paperverse!

Book of Demons is indeed a dark fantasy hack & slash, but unlike other action role-playing games, it's set in the pop-up book world of Paperverse. The paper-cut universe is one of the hallmarks of Return 2 Games - a series of mid-core games, inspired by the early golden days of PC gaming. Book of Demons is the first installment of the Return 2 Games series.

Looking for even more challenge?

Slaying the Archdemon won't be the end of the story. In Book of Demons, you can master the campaign with 3 different classes (Warrior, Rogue or Mage), revisit your favorite quests in Freeplay mode or rise to the challenge and explore the dungeons on higher difficulty levels (the last one is called Massacre, with good reason).

System Requirements

    • OS: Windows Vista, 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
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