Book of Darkness Review Scores

Game title: Book of Darkness

Game description: Book of Darkness is a 5x3 reel slot from Betsoft that’s anything but ordinary. The title is distinguished by its many colorful bonus features. The Clash for Power is certainly the best, but there are free spins available through more conventional means too. Scatter symbols award up to 5 spins, and a payout too!

Play Book of Darkness

  • Graphics & Sound
  • Gameplay
  • Features & Bonuses
  • Free Spins
  • Thrill Factor


  • Great Graphics
  • Free Spins
  • Above Average RTP


  • Low Payouts

It’s the type of slot machine to promise both power and riches to its players, and it comes from Betsoft. Book of Darkness slot gives us access to a fantasy world, where we get to pick our fighter before we adventure into the unknown. With mages and warriors among its symbols, and with a Book of Darkness that’s waiting to reveal its power, it certainly sounds like it’s going to be a fun adventure, so we can’t wait to see this one release. Magic potions, enchanted crystals, and mysterious rings join the main characters, along with the powerful book, which unlocks a free spins feature. Expanded symbols appear during the round, as the Huntress and Dark Wizard fight to award further bonus games with multipliers or even more symbol expansions. If you believe in magic, this slot is going to be your cup of tea.

Welcome to Book of Darkness
Welcome to Book of Darkness

Book of Darkness spins 5×3 reels each round, offering 10 active lines in its game area. A slot with high volatility, it offers a fairly low top payout of 640x the stake, but makes it all right with the help of its 96.48% RTP. It features a high hit frequency rate, and adds features ranging from wild/scatter symbols, to the Clash for Power bonus, or the free spins that can result from it. Book of Darkness’ ghastly interior is at once intriguing. It’s a cavernous hall, draped in mysterious green light and encroaching ruin. An echoing voice tempts the player to delve deeper, asking “can you find the book of darkness?” and suspenseful music plays in the background. This slot oozes tension. The reels spin with a soft thrum that cuts across the music, and symbols enlarge and glow when they form winning combinations. 

Book of Darkness Gameplay

Before starting Book of Darkness, there are certain things you can do to set it up under your preferences. You can see the betting amount right below the reels. You can set it from 0.10 to 50.00 per spin. Conversely, playing on the maximum bet settings can lead to a win of up to 640x the total stake. However, there is no Bet Per Line button like on most other slots. The slot has 10 paylines and they are set in place which means all 10 remain active throughout the whole gameplay. On top of that, the game is set on a 5×3 reel making winning combinations easy to come by. Keep in mind that this slot can be played with bitcoin. However, you can play with regular FIAT currency as well.


Hitting the Spin button will start the Book of Darkness online slot. The button can be found in the bottom-right corner of the reels. Right next to it, you can see the Autoplay button which is used to spin the reels automatically. This is a feature often added to slots by game developers. The button to control the background sound is on the bottom-left side of the reels. There is an “I” button next to it where all the game options can be found. Last but not least, this slot also have a Double Up button which initiates a gamble feature.


Symbols have a distinctly gothic design and include a book of spells and the Dark Wizard and Huntress, which top the paytable. Mid range symbols are rubies, an enchanted ring, a potion and a dagger. The letters A, K and Q have a slightly lower value. Book of Darkness is distinguished by its many colorful bonus features. The Clash for Power is certainly the best, but there are free spins available through more conventional means too. Scatter symbols award up to 5 spins, and a payout too! Everything on Book of Darkness has a simmering quality, as though the slot might boil over at any point, or something terrifying might emerge from the dark. Below, we will talk more about the bonus features of this slot.

Book of Darkness Features and Bonuses

Few online slots put as much effort into their bonus features as Book of Darkness. Consequently, they’re some of the best in the business, and this guide should help you enjoy them. If you get a Book of Darkness icon, you’re looking at the game’s wild. It’s also a scatter, since its presence on the reels can lead to free spins and cash prizes, if there are enough of them visible. As a matter of fact, all the features in this title offer free spins which is what players love. Sadly, unlike many Betsoft slots, this one doesn’t have a gamble feature. However, with the abundance of free spins offered by the game, such a feature is not needed. Keep reading to learn more about the bonus features of this fantastic title.

Wild Feature

The Book of Darkness is your go-to symbol which is also behaving as a Wild in the game, and can substitute for all the symbols in the game except for the Huntress and the Dark Wizard. However, that’s not all because this symbol is also the scatter of the game. As such, it triggers free spins when you get enough of them on the reels.

Wild Feature
Wild Feature

Free Spins

As many casino games have, Book of Darkness also has a free spins feature. Once you find at least 3 Book of Darkness symbols on the reels you will get the scatter payouts awarded and then trigger the Free Spins round. The number of spins that you will get will depend solely on the number of triggering symbols – and you can win 10, 15 or 20 spins. Additionally, before the round starts, a random symbol will get chosen to become the Expanding symbol that will cover entire reels when 3 or more of them show that symbol on the same spin. Even better, big symbol expansions also occur during the free spins! For the big wins. The average trigger for the free spins is 40 to 50 spins. Despite being a low variance slot, the free spins feature packs quite the punch.

Book of Darkness Free Spins
Free Spins

Thrill Factor

There is one more feature that the Book of Darkness slot has and we have to mention it. It’s a feature which acts as a bonus round, separate from the regular gameplay which is why we consider it the Thrill factor. It’s a free spins feature which is favorite among players. However, this free spins feature comes with something extra that players love. It’s something that triggers even more free spins. The feature is known as “The Clash for Power” and it’s one of the best that Betsoft have ever offered. Below, we will explain this feature in detail.

The Clash for Power

There are two sides to any story, and power struggle. This one confronts the Huntress and the Dark Wizard, and before the battle starts, you will get to choose the side you want to fight on. Once the Epic battle begins, you will get free spins awarded and the heroes will become the Expanding symbols for the feature’s duration. Be careful and make sure to watch the Hero Meter as it fills up during the battle, and which ever hero wins the battle will get the Book of Darkness that will show the right way to cast the spell and trigger the Shadowform which is the ultimate power of the book. This is the type of feature that Betsoft love adding to their online slots. You can read more about such features on their website.

The Clash For Power
The Clash For Power


Once your hero wins the battle and snags the book, the special bonus round that will award you 10 free spins. If you pick the Huntress for the battle and she wins, you will get 10 spins and x5 multiplier awarded to your wins during the Shadowform round, and if you choose the Wizard, and he wins the battle, you will be getting 10 spins and an increasing number of Expanding symbol that can go up to five.

Book of Darkness Shadowform


Online slots don’t come much more intense than Book of Darkness. It establishes its fraught atmosphere from the off and doesn’t let the tension drop even for a moment. It’s quite an achievement, and Betsoft should be congratulated on producing a genuinely filmic game. All that tension would be useless if the slot didn’t build towards any real crescendo. That’s where the bonuses come in, and especially The Clash for Power. Free spins are something to aim for, but The Clash for Power is the beating heart of this slot. Picking a hero and then watching them fight is truly compelling, especially when there are yet more free spins on the line! We would have loved a little more resolution or explanation of the world, but our lingering curiosity is testament to how well Book of Darkness is designed!

For more information about the slot, play Book of Darkness on our Bitcoin Casino.

Please, also read our review on Betsoft’s Dim Sum Prize slot.