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| Game developer | Quickspin |
| Progressive Jackpot | |
| Configurable winlines | |
| Free spins | |
| Autoplay | |
| Quickspin feature | |
| Gamble feature |
| Bonus buy | |
| Number of winlines | 10 |
| Layout | 3-3-3-3-3 |
| Min bet | $0.1 |
| Max bet | $100 |
| Release date | January 2023 |
| Last update | 27 Jan 2024 |
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Book of Inferno slot online for free in demo mode. Play free casino games, no download required. Expert review included.
This average RTP (96.15%), high volatility fantasy-themed slot lets players hunt demons as they engage exciting bonus features.
Read full reviewPlayers will descend into a fiery underworld with Book of Inferno.
Anna the Demon Huntress leads players on a perilous mission to find a legendary book. If they can defeat a variety of demons, they might escape this world of brimstone alive.
Players who enjoy fantasy and superhero narratives may especially enjoy this slot.
Book of Inferno’s soundtrack is infused with a heavy metal tone and a fast-paced drumbeat. This creates plenty of dramatic tension, though some players might find the relentless rhythm unsustainable for longer sessions. For them, the mute button is at hand.
The high quality graphics immediately give Book of Inferno an immersive feel. A hellish landscape in the background features glowing lakes of lava and plenty of sharp rocks.
The reels are accented with winged gargoyles that add to the gothic aesthetic. Among the symbols, players will find letters etched into glowing metal, along with a number of intimidating demon characters. One of the most intimidating is a four-eyed demon with her tongue extended like a snake.
This slot’s heroine is Anna, one of Quickspins' recurring characters, and in this incarnation she is a demon huntress. She sports a superhero-style ensemble, and her glowing green eyes make it clear she has special powers.
Overall, the soundtrack and animation of Book of Inferno create an exhilarating adventure fantasy.
Book of Inferno is a five-reel, three-row slot with 10 win lines.
Players can buy directly into the Free Spins feature by paying 125x their total bet.
Fast-paced gameplay ensures players will easily stay engaged.
The Book symbols are Wild symbols that substitute for all symbols.
A Marked symbol will expand to cover its entire reel whenever there are enough Marked symbols to create a win. These symbols do not need to appear in sequence on the reels for win evaluations.
Whenever a Book symbol lands along with a Marked symbol, the Marked symbol is upgraded, creating greater potential for wins and expansions.
In the event that a Marked symbol is upgraded to the highest symbol, the lowest symbol is transformed into the highest.
When players land 3 or more Book symbols, the Free Spin feature begins. The number of free spins as well as the special multiplier awarded depend on the number of triggering Book symbols:
The Free Spins feature can be retriggered within the feature.
Throughout the Free Spins feature, a randomly selected symbol is selected to be a Marked symbol.
The return to player of Book of Inferno is 96.15%, our yardstick for average of roughly 96%.
The range of bets on the site we tested ran from a minimum bet per spin of $/£/€0.10 up to a maximum of $/£/€100 per spin.
The volatility of Book of Inferno is high, making it a good match for our preferred slot machine strategies. We advise targeting the highest possible volatility when selecting slots.
We recommend this average RTP, high volatility fantasy adventure-themed slot.
Book of Inferno offers vivid animation and an engrossing gameworld. Mathematically-inclined players will appreciate the reasonable RTP and ample volatility as well.
Entertaining bonus features add further allure to this slot.
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