Book of Inferno

First Impressions

Book of Inferno by Quickspin throws you headfirst into a dark, explosive world ruled by demons, lava, and one incredibly tough heroine. Right from the get-go, the atmosphere is unmistakable: sharp, gothic visuals dominate, with molten rivers in the background, detailed demon sculptures on the reels, and a red-orange palette that radiates heat. Anna the Demon Huntress, a familiar face for fans of Quickspin’s action slots, is the central figure here, taking players on a supernatural quest for the mythical tome itself.

The graphics feel almost cinematic—a step up even for Quickspin—with smooth animations and themed symbols etched in metal, like someone hammered out each rune and demon by hand. Then there’s the sound. The rock-laced, heavy metal soundtrack is intense and relentless, like the soundtrack to a boss fight that never quite ends. It nails the adrenaline, though it might be a bit much if you prefer slots to quietly fade into the background.

Book of Inferno runs on a 5x3 grid with only 10 paylines, but don’t let the small number fool you—this is a high volatility slot with serious punch. The RTP stands at 96.15%, right on par with most modern releases. Wins don’t come every other spin, but when they do, they can be bigger than most, especially if you trigger the bonus features.

Symbols and Payouts

Check out the paytable and the Book of Inferno slot feels both classic and fresh. At the low end, you’ve got the standard 10, J, Q, K, and A, each styled in glowing, ancient script with steel borders, fitting perfectly with the underworld theme. These low pays do pack the lowest rewards, so you’ll be hoping for the bigger beasts.

Next up are the mid-tier demon faces—each a different monstrous creation, from skull-headed fiends to tentacled horrors. Every detail—the twisted horns, fiery eyes—makes these mid pays stand out, but what you really want to see is Anna herself. She’s the highest-paying base symbol by a long shot, ready in battle stance, glowing eyes on full display. Line up five Annas and you’ll pocket the top standard prize, which honestly feels worth the effort given how rarely she graces the reels.

Book symbols are the all-important special here—they double as both Wild and Scatter. As Wilds, they substitute for anything to help complete a win. As Scatters, they’re your ticket to the real action in the bonus round. Marked symbols also play a key role, turning ordinary pays into expanding, screen-filling win opportunities. All the symbols work together to build up a real sense of narrative and momentum—not every slot can pull that off.

Bonus Features and Free Spins

The heart of Book of Inferno lies in its expanding symbols and beefed-up Free Spins. There’s a bit of that 'Book'-style magic here: if you’ve played other 'Book of...' slots, you’ll recognize the expanding mechanics but with a distinctive Quickspin twist.

Here’s how it works: whenever Book symbols land, they don’t just fill in for missing matches—they also mark a random symbol on the reels to expand vertically if it can create a win, regardless of regular payline rules. It’s a fantastic way to land big combo hits, especially since these expansions can easily fill multiple reels for a full-screen payout.

If your Marked symbol combines with a Book, it upgrades up the paytable ladder; get enough upgrades and you could even see low-paying symbols transformed into the top symbol. It’s a visually satisfying mechanic and the kind of thing that makes every spin feel loaded with potential, especially when Book symbols start clustering.

The Free Spins round triggers when 3 or more Book (Scatter) symbols land anywhere. For 3 Books, you get 10 free spins and a 2x multiplier. Four brings 15 free spins and a 20x multiplier, and if you get 5 Books, you unlock the maximum—25 free spins plus a whopping 200x multiplier. That’s a major incentive to hope for those five, though it’s predictably rare. At the start of Free Spins, a random regular symbol becomes your special Marked symbol, meaning every time it lands, it can expand and cover reels for impressive payouts.

Quickspin even adds an ante option: buy straight into the Free Spins for 125x your bet, a handy feature for anyone who’d rather skip the base game grind. (That being said, purchases at this price do carry risk, especially in a high-volatility game.)

Unlike some other bonus rounds out there, Free Spins in Book of Inferno can sometimes be retriggered, depending on which version or jurisdiction you’re playing; always check the info panel for local rules. Sadly, there’s no progressive jackpot here, but with the potential from multipliers and symbol upgrades, big wins are definitely possible if luck’s on your side.

Getting Started

Jumping into Book of Inferno slot is straightforward, even if it’s your first time at the gates of hell. The spin button is bold and central beneath the reels, with a smaller autoplay option tucked neatly nearby for those who like to let fate run its course. To the side, you’ll find quick controls for bet sizing—these range from a wallet-friendly €0.10 a spin right up to a fiery €100 per spin, covering both cautious players and high rollers.

The 10 paylines are fixed, so no need to fuss with adjusting lines—just pick your stake and go. If you’re short on time or just impatient for some action, turbo mode is available and kicks the pace up another notch. There’s no separate gamble feature for doubling up wins, but honestly, with the high volatility and those juicy bonus rounds, Book of Inferno offers more than enough risk and reward already.

For newcomers or anyone wanting to try the game risk-free, the Book of Inferno demo is widely available—perfect for testing the waters and getting a feel for those unique features before putting real money down.

Verdict

As demon-themed adventures go, Book of Inferno is hard to beat for atmosphere and action. Quickspin has poured real character into every detail, from Anna’s superheroine energy to the ferocious demon designs and relentless soundtrack. The bonus mechanics, especially Marked symbols and their upgrades, bring a level of engagement missing from many ‘Book of’ slots and can deliver adrenaline-pumping wins.

High volatility means long dry spells sometimes, but the big wins (especially in Free Spins with those hefty multipliers) make the wait worthwhile for those with the patience—and bankroll—to ride out the ups and downs. The capped number of features is a minor con; outside the main mechanics and expanding symbols, there are no extra side games or progressive jackpots. For hardcore feature-hunters, this might seem a touch barebones.

That said, Book of Inferno has a clear identity and delivers what it promises: high-stakes thrills, bold visuals, and bonus rounds that keep players genuinely invested. It’s best suited to players who love dramatic fantasy themes and don’t mind a brisk, sometimes brutal ride—or anyone curious enough to check out the Book of Inferno free play version before plunging in for real. If bold risks and hellish adventures appeal, this fiery slot is absolutely worth a few spins.