Book of Inferno — RTP, volatility and max win

Book of Inferno by Quickspin takes the familiar book formula down to hell: the devil and his demons stand on the reels in red, brown and black. Scatters open the free spins, and expanding symbols stretch over whole reels to fill lines in one go.

Book of Inferno came out on January 25, 2023. Quickspin keeps the grid of the classic book slots and gives it a hellish look with fiery highlights and dark demon figures. On its 5×3 field run 10 paylines, a slim line set where one expanded symbol quickly covers several lines. Bets begin at €0.10 and climb to €100, so the game works for small budgets as well as larger ones.

Payouts follow fixed lines: a combination of equal icons must start on reel one and continue unbroken along one of the 10 paylines. The wild fills gaps in a line. Once it expands, an expanding symbol occupies every position on its reel and counts on each line running through that reel. Scatters trigger the bonus rounds, and the bonus buy skips the wait.

Expanding symbols: a symbol grows over its entire reel. When several of them line up next to each other, hits appear on many of the 10 paylines at once.

Free spins: the scatter-triggered round is where the big wins in Book of Inferno happen.

Feature buy: paying for the free spins gets you in without waiting on scatters.

Since expanding symbols fill whole reels in Book of Inferno, more games built on that mechanic are in inferno slots with expanding symbols.

RTP 94.19%, lower than 88% of the 400 Inferno slots. Background: how RTP works on a slot. Volatility High, like 85 of the 180 slots in the Hell & devil theme. Background: what slot volatility means. Max win 5,798× (€579,800 at the highest stake).

Returning 94.19%, Book of Inferno lands in the bottom eighth of the Inferno slots.

Its 5,798× cap, on the other hand, sits in the upper half of the collection. High volatility is typical of book slots: the base game pays small line hits, and the big sums come when expanded symbols fill several reels during the free spins. Long quiet stretches before a strong round are part of that design.

Because Quickspin sets a band within which casinos pick the return of Book of Inferno, check the RTP comparison of inferno slots, as games like this are flagged there.

Again with matching high volatility, a similar RTP plus a hell theme as the motif, as with Book of Inferno: