Book of Abyss Demo Play Free Demo Slot

Slot Overview

Book of Abyss is a demon-inspired “Book of” slot from Just Slots, and it’s built around classic expanding-symbol Free Spins plus a pretty unique (and very exciting) pre-bonus Gamble that can upgrade both your chosen expanding symbol and your starting multiplier. With an eye-watering maximum win potential of 150,000x… this is a game that MUST be given a closer look. Our findings? Let’s find out.

Gameplay & Bonus Features

Book of Abyss uses 5 reels, 3 rows, and 10 fixed paylines, and you can bet between €0.10 and €5 per spin. The listed RTP is 98.03%, though alternative versions also exist at 96.36%, 94.33%, and 92.42%, so it’s worth checking what version you’re playing.

Now, in keeping with most “Book of” slots, Book of Abyss doesn’t offer much in the way of base game action. Most win potential is found inside the Free Spins bonus, triggered by landing 3, 4, or 5 of the Scatter symbols anywhere in view. Now, before the free spins begin, one expanding symbol is chosen randomly, with a starting multiplier between 1x and 100x. Landing 4 Scatter symbols guarantees a 2x+ multiplier, while 5 Scatters guarantees a 10x+ multiplier.

Before the bonus begins, you’ll also see the option to gamble. Instead of the usual “double your win” approach, you can gamble on a wheel, with the goal of upgrading your expanding symbol or increasing your multiplier. It’s possible to start with the highest-paying symbol as the expanding one and a 100x multiplier, which is where things can get very interesting.

Now, during the bonus, the chosen symbol expands whenever it forms a win, and it doesn’t need to be adjacent to count, either. You can also re-trigger the feature: landing 2, 3, 4, or 5 additional Scatters awards +3/10/15/20 extra free games, respectively, with an additional multiplier of between 2x and 100x applied.

Bonus Buy & Ante Bet

Book of Abyss contains a few Feature Buy options. You can buy a 3 Scatter trigger for 100x, a 4 Scatter trigger for 300x, and a 5 Scatter trigger for 1,250x. There’s also a HotSpin (Ante Bet) that increases your base game stake by 300x and adds extra Scatters to the reels, making it easier to land the bonus round naturally.

Theme & Design

Book of Abyss doesn’t use the classic “dusty tomb” look and feel you may be used to in games like Book of Dead and Book of Ra Deluxe. Instead, you’ll be transported into an underground throne room, complete with a demonic queen sitting over a dark castle backdrop. For us, the game kind of gives off a Halloween vibe, but Just Slots has pulled it off well, and it’s definitely a game that’s playable all year round.

The game’s symbols are also a lot stronger than you’d expect from a “Book of” clone, and the low-value symbols include various runes, while the mid-paying ones include candles, rings, and a heart. The high-value symbols are a set of characters, and visually, we have absolutely zero complaints here!