Book of Inferno
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Book of Inferno
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Book of Inferno Slot Review

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How to play Book of Inferno mobile slot

Welcome to Hell, as this Book of Inferno slot takes a simple 5 rows and 10 payline game with expanding scatter pays and adds a bigger top win and more opportunities for wins.

The Book of Dead slot, the Legacy of Dead game, the Book of Tut review… you know the drill. Ancient Egyptian game where you can win 5,000x your bet in the free spins thanks to expanding scatter pays.

The Book of Inferno slot follows a similar familiar mechanic – the demon book is both the wild and the scatter. 3 or more will trigger the free spin bonus where one symbol expands and pays like a scatter over all 10 paylines.

The difference is that you can win 5846x your bet, bet as high as 100 a spin, and all for a high RTP of 96.15%.

Oh, and did we mention you can get expanding scatter pays in the base game and upgrade them? No? Read on or get playing; you won’t be disappointed.

The Book of Inferno slot: the expanding scatter pay symbols

Randomly on any high-paying spin, one symbol can be ‘marked’ and will pay as an expanding scatter pay on the next spin. Sometimes it lands and pays, sometimes it doesn’t, but it always adds excitement to this sulphurous atmosphere.

If a Book of Demon slot symbol also shows up simultaneously, that expanding scatter pay is upgraded to the next high-paying symbol on the paytable. This can continue till you get to the highest-paying Anna the Demon Huntress.

Mostly you are lucky for one upgrade, but every upgrade is appreciated, especially in the free spins.

Because whilst in real money slots like the Book of Ra Deluxe 6 slot, you aren’t stuck with whatever symbol is chosen for you, here there is always an opportunity to upgrade.

Should you buy the free spin slot bonus?

For 125x your bet, you can buy entry straight into the free spin bonus.

But you better hope you get one of the four main character symbols: Anna, the Lord, the Lady, or the Commander of Hell; otherwise, it’s hard to upgrade the symbols enough to make this huge cost worthwhile.

Much like many other video slots of this type, this Book of Inferno slot free spins can take its sweet time to give you the bonus. Thankfully, giving you expanding scatter pays in the base game is a brilliant way to keep you hooked on each spin.

If you love the genre, head straight to hell at one of our best Quickspin casinos to try and hit that top win of 5846x your bet.

Game Screenshots

Book of Inferno slot stats

Mobile Slot releasedFebruary 2023
Slot typeVideo Slot
Slot reels / paylines5 Reels / 10 Paylines
House edge / RTP3.85% / 96.15%
Slot volatilityHigh
Min/Max bet0.10 / 100
Max win5846x your bet
Free spins10 to 25 Free Spins / Expanding Scatter Pays
Bonus roundsWild, Scatters, Upgraded Symbols, Expanding Scatter Pay, Free Spins, Buy Bonus, Respin
Slot ThemesFantasy
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Bonus Features

Books Wild and Scatter: The Book symbol is both wild and scatter symbol. It both replaces other symbols to create a win, and 3 will trigger the free spins.

Marked Symbol: Randomly, a marked symbol will appear and be picked at random. In the next spin, that symbol will now expand to cover the reel and pay like a scatter - pretty much anywhere it lands; it pays on all paylines.

Any book symbol that lands together with a marked symbol will upgrade to the next high-paying symbol on the paytable.

If a Marked symbol is upgraded past the highest symbol, the lowest symbol is upgraded to the highest-paid one.

Free Spins Bonus: 3 scatter wilds will trigger the free spin bonus. You can retrigger the bonus indefinitely.

  • 3 Books award 10 Free Spins
  • 4 Books award 15 Free Spins
  • 5 Books award 25 Free Spins

At the start of the free spins, one random symbol will be selected to be a marked symbol or an expanded scatter pay.

Buy Feature: for 125x your bet you can buy direct entry into the free spin bonus.


  • High 5,846x stake max win
  • Free spins with Expanding Scatters
  • High 96.15% RTP
  • Low 0.10 minimum bet


  • RTP can be as low as 87.16% at some slot sites

Book of Inferno Review Conclusion

We love the mechanics and the look of this Book of Inferno slot on mobile. It takes all the elements we love from similar slot games but with a new twist and fresh modern graphics.

It's such a simple idea. Take the Book of Ra Deluxe slot and then make it easier to upgrade the expanding scatter pay symbols both in the base game and the free spins.

Add a great top win of over 5,000x your bet and a high RTP 96.15%, and this is easily one of the best Quickspin slots of late. And they've had plenty of great games recently.

Watch out for the paytable, as slot sites can choose to put this machine up in their casino as the 96.15% / 94.19% / 87.16% RTP version. Only play on the highest or none at all.

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Review by Lucky Mobile Slots, last updated: February 27, 2023 - Rating 5

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