Book Of Darkness
96.7%
RTP
20,000x
Max Win
Bonus buy options
- Bonus100x bet
- Super Bonus200x bet
- Reels
- 5
- Rows
- 5
- Paylines (up to)
- 20
- Min Bet
- 0.1
- Max Bet
- 1000
- Release Date
- September 7, 2026
About this Slot
Book Of Darkness is a horror-themed slot from Traumatic Play with an RTP of 96.7%, high volatility and a maximum win of 20,000x. The game features five reels, five rows and 20 paylines.
The Book symbol acts as both a wild and scatter. Three books trigger the Bonus tier, four books trigger the Super Bonus tier, and five books trigger the Hidden Bonus tier. Three or more books during a bonus round retrigger 10 additional free spins.
The Bonus tier awards 10 free spins with one randomly selected expanding symbol. A natural reel of the selected symbol must appear to enable expansion, and temporary wild symbol reels multiply the expansion value during the feature.
The Super Bonus tier grants 10 free spins with one expanding symbol selected. Every wild symbol that lands stays sticky throughout the round, and a natural reel must qualify before sticky wild symbol reels join the expansion.
The Hidden Bonus tier begins with one sticky wild symbol reel already in place. A natural reel must qualify to trigger expansion, after which sticky wild symbol reels join the feature.
Double Boost costs 1.2 times the bet and doubles the chance of triggering free spins. This option remains active until disabled. Super Boost costs 5 times the bet, greatly increases the chance of landing bonus symbols and guarantees one or more scatters, with a one in 20 chance of triggering free spins per spin.
Two bonus buy options are available. The Bonus costs 100 times the bet, and the Super Bonus costs 200 times the bet.
Book Of Darkness Community RTP
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Book Of Darkness RTP Calculator
Book Of Darkness has a theoretical RTP of 96.7%. Its volatility is High, so expect long dry spells punctuated by rare, large multipliers. Its win potential is capped at 20,000x your stake. Use the calculator below to estimate your expected return, variance range and risk of ruin over any number of spins.
Book Of Darkness Variance Simulator
Book Of Darkness sessions can swing far from its 96.7% average - its volatility is rated High. The simulator runs many virtual bankroll runs to estimate the bust rate, typical drawdown and best/worst outcomes over a set number of spins - compare a cautious bankroll against an aggressive one.
All Wins
No wins on this slot yet.
Play on Stake*Frequently asked questions about Book Of Darkness
An RTP of 96.7% means Book Of Darkness is built to pay back around 96.7 for every 100 wagered over millions of spins. Any single session can land far above or below that - use the RTP calculator on this page to model your own bet size and spin count.
Over the long run Book Of Darkness's house edge is about 3.3% of everything you wager - roughly 3.3 lost per 100 staked. Short sessions vary widely; the calculator above shows the expected loss and variance range for your inputs.
Quite a lot. Because wins cluster around rare big hits, your balance can move far from the 96.7% average in either direction. The variance simulator above shows typical drawdowns, bust rate and best/worst outcomes for your bankroll.
It depends on your bet size and how long you want to play Book Of Darkness. Use the variance simulator above to test a cautious versus an aggressive bankroll and see how often each survives your target number of spins.
