Book of Demons

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.
Minimum Requirements
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
Additional Notes: Controller Support
Minimum Requirements
OS: OSX 10.12+
Memory: 2 GB RAM
Graphics: Open GL 3.3+ Compliant
Storage: 1 GB available space
Additional Notes: No Controller Support
  • Book of Demons is a hidden gem, taking some of the best elements from action RPGs like Diablo and Path of Exile. It maintains its unique paper cut-out style, while providing a fun and intriguing equipment and advancement system.

  • Book of Demons is rather brilliant in its own small way. It strips the Diablo formula to its bare essentials without sacrificing any of its appeal. In some ways, it even improves on Blizzard’s series. If you’re a busy adult pining for your 90s gaming heyday, Book of Demons is a must play, but really, everyone ought to give it a shot. This deceptively addictive dungeon crawl is worth getting fired up about.

  • A dungeon-crawler that contains an addictive card game element as the crux of its gameplay design while making the experience as easy as possible for the player to stay focused on creative elements of the game.

  • Book of Demons introduces a unique card-based skill system and a sense of humor to the stuck-in-its-ways ARPG genre. It has plenty of tricks in its dungeon to keep you on your toes, but gives you ample ways to form your own strategy. With three distinct classes and an endlessly replayable quest, you can get lost in Book of Demons’ papercut dungeon for quite a while.

  • I’ve touched on the art style, but it really is gorgeous and unique, with paper outlines and great visuals. This, combined with the Flexisphere, which understands the limitations of modern gamers’ time better than any game I’ve seen, and with its streamlined mechanics and entertaining deck-building system, Book of Demons is definitely worth checking out. It’s got a few issues to work on, sure, but that’s what the next six games in the Paperverse are for, right?

  • Book of Demons is a fun Diablo-like game, but some of the mechanics might be a turnoff for others. Movement is locked to set paths while enemies are free to roam around and there is no equipment as cards represent spells, items, and artifacts in the game. That said, there is still quite a bit to like about Book of Demons as there is a good amount of strategy to employ if you want to survive. However, the price tag might be a bit much given the restrictions some of the mechanics place on you.

  • Book of Demons is an approachable, addictive action-RPG with a few new ideas but overall, an admirably lean approach that doesn’t allow feature-creep or overly ambitious design muddy the fun. Distinguished by its paper book aesthetic and player-friendly mechanics, Book of Demons is thin on story and level-by-level lacks variety but the ability to determine the length of each play session means that it won’t overstay its welcome.

  • CD-Action

    A highly addictive hack’n’slash with great art direction and many small but really good gameplay ideas. The developers wear their inspirations on their sleeve, so you can almost hear the game shout “Yes, this is Diablo! Yup, it’s Tristram! Don’t pretend you don’t remember!”. [02/2019, p.36]

  • Although I was initially unsure about it, Book of Demons turned into another pleasant indie surprise. It’s beautifully stylized, you can easily adjust its scope to fit your schedule and the challenge is appropriately set.

  • Book of Demons, with its wonderful game design and inventive, is an hack’n’slash that respects the time of the player. It’s ironic, fun to play, and challenging. The card system is solid: we hope to see it improved in future "Return 2 Games" installments.

  • Book of Demons sets a fantastic foundation for the next tale in the Paperverse.

  • Book of Demons is designed from the ground up to be an accessible, lighter take on the classic ARPG. And it manages to do so without being dumbed down, or too simplistic that it’s not fun. In short, it aimed to pay homage to Diablo but instead has gracefully made its own impact on a crowded genre.

  • '90s-inspired card-building hack 'n' slasher Book of Demons is far from a perfect game. That's not the sad thing about it, though. The sad thing is that it could certainly be perfect if the developer used the full potential of this fine take on action-RPGs. Having said that, fans of the genre should definitely give it a look, if only to taste what is a labour of love that just so happens to also be technically sound.

  • Book of Demons has some good ideas which often are well implemented, but in certain situations Diablo's inspiration becomes a cage a bit too narrow.

  • We’ve enjoyed Book of Demons, and it definitely does something different and fun, but we’re missing that little something for it to truly shine.

  • Book of Demons certainly lacks in variability, and it's easy to fall into a habit. For those looking for a greater challenge, the roguelike mode can add spice as players enter a leaderboard on first death and can permanently die if they're short on funds, but this doesn't entirely solve the issue of repetition. The first of seven planned titles, Thing Trunk has a lifetime of work ahead of them, and I'm eager to see what other unique treasures they create.

  • A nice hack and slash game with the beautiful art style and solid combat. But the card system doesn't balance decently and it makes the long-term experience boring.

  • Book of Demons is a big tribute to Diablo.

  • Book of Demons is a fun romp, though it’s not as engrossing and captivating as other, more "serious" action/RPGs.

  • Edge Magazine

    This is one hybrid genre piece that's ever so difficult to put down. [March 2019, p.116]

  • Delightful, fun, quirky -- Book of Demons keeps you entertained as it provides a unique take on what Diablo and the ARPG genre provides. Unfortunately, it also becomes repetitive and aimless towards the end.

  • Book of Demons brings pen and paper and action mechanics to the Diablo style gameplay system. It's unique approach to time management on quests gives a lot to the game for those of us with limited time. If you're a Diablo fan looking for a change of scenery, you might find Book of Demons to be right up your alley!.

  • Book of Demons is a game that manages, albeit with some difficulty, to welcome the players little accustomed to the genre towards hours of healthy hack 'n' slash shear-devils.

  • As a clicker/dungeon crawler hybrid, Book of Demons could become a very effective draw on smartphones, but focusing on it during extended PC play-sessions exposes how fundamentally shallow it really is.

  • LEVEL (Czech Republic)

    A decent attempt at a paper version of simplistic Diablo, which, however, suffers from slight repetitiveness and relative shortness. But still, it is worth a try. [Issue#292]

  • The constant gratification of loot and bite-size gameplay chunks of Book of Demons make it inherently easy and gratifying to pick up and play — a good first step for this ambitious undertaking. But the game, though having a clean and perfectly adequate presentation, doesn’t do very much to put its best foot forward to wow the player presentation-wise, and the finger-numbing clicky gameplay might be just a bit too underwhelming for some to ride this train all the way to its final stop.

  • Book of Demons is a beautiful roguelite dungeon crawler with enemy variety and a plethora of interesting systems built upon a sheer lack of player-side input. A decent time waster, but difficult to recommend at launch prices.

Book of Demons
$24.99 $9.63
Title: Book of Demons
Genre: Action, Adventure, Casual, Indie, RPG
Released: 13 December 2018
Developer: Thing Trunk
Publisher: Thing Trunk
  • Single-player
  • Steam Achievements
  • Steam Cloud
  • Captions available
  • Stats
  • Steam Trading Cards
  • Steam Leaderboards
  • Full controller support
  • Remote Play on TV
UI Audio Subs
Spanish - Spain
Simplified Chinese
Portuguese - Brazil
Traditional Chinese
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