It’s just another day in the life of Anna the Explorer, where a trio of demons have started crossing over into our realm to take over our world and end life as we know it forever. No biggie.

Equipped with a powerful armour and lots of Red Bull, Anna heads into the abyss of darkness while channelling her inner demon huntress. Guided by the Book of Inferno to track down her targets, she’s taking on her most intimidating enemies so far: The Lord of Hell, The Lady of Hell, and the Commander of Hell.

But there are even greater dangers lurking inside the fires of hell. Will Anna be able to outsmart the twisted logic of the Inferno?

Book of Inferno is a classic 10-line Book-game with high volatility and a high max win, boasting Expanding Pay Anywhere Symbols, a Free Spins Bonus with permanent Expanding Symbols, a Buy feature (pay to get instant entry to the bonus game), plus a unique Upgrade Expanding Symbols feature that can turn any spin into an Epic Win!

Game Features

Books

Book symbols substitute for all other symbols.

Marked Symbol

Anytime a Marked symbol lands on the reels, if there are enough of them to pay: the Marked symbols will be expanded to cover their entire reel and pay anywhere on a line, without the need to be in sequence from left to right in an extra win evaluation.

Any Book symbol that lands together with a Marked symbol will upgrade the Marked symbol one step, potentially creating more Marked symbols and expansions.

If a Marked symbol is upgraded past the highest symbol, the lowest symbol will be converted into the highest.

Free Spins Bonus

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

Books award the same amount of extra free spins when re-triggered inside the Free Spins Bonus. At the start of the Free Spins Bonus, a random symbol will be selected as Marked.

Buy Feature

You can buy instant entry into the Free Spins Bonus. By paying 125x bet, the feature will trigger with 3 or more Books with the same frequency as when triggered by chance.

The Buy Feature may not be available in all markets.