Quick answer
Book of Halloween is a Inspired Entertainment slot (2019) with 96.21% RTP and high volatility. It has free spins, expanding reels and gamble feature. RTP can vary by casino.
On this page8 sections
Key specs
- RTP
- 96.21%
- 0.17 points above the median (96.04%)
- Volatility
- High5 of 6 on our volatility scale
- Hit frequency
- 33% (about 1 in 3.0 spins)
- Grid
- 5×3
- Released
- 5 Oct 2019
- Bet range
- $0.10–$100
- Jackpot
- None
Not published by the provider: max win
Top-rated casinos (check the game is available)
We haven't confirmed which partner carries this game.
Ad disclosure: we currently earn nothing from the brands listed; if that changes, each offer will say so. How we make money
- Aurivo Casino100% up to $1,000 + 200 Free Spins30x bonusGet 200 spins + 100% at Aurivo Casino (opens in new tab)
18+. New customers. Min dep $20. 30x bonus wagering. Max bet $5. 30 days. 200 spins on Book of Dead at $0.20. Credited in daily batches of 20 over 10 days. Full T&Cs apply.
Key terms
Every significant term is in the line above.
Full T&Cs apply. Please gamble responsibly.
- Velmora150 No-Wager Free Spins Keep every winNo wageringClaim 150 no-wager spins at Velmora (opens in new tab)
18+. New customers. Min dep $20. No wagering. 7 days. 150 spins on Big Bass Bonanza at $0.10. Full T&Cs apply.
Key terms
Every significant term is in the line above.
Full T&Cs apply. Please gamble responsibly.
- Kronos Royale200% up to $2,000 + 10% weekly cashback40x bonusGet 200% bonus at Kronos Royale (opens in new tab)
18+. New customers. Min dep $50. 40x bonus wagering. Max bet $10. 60 days. Full T&Cs apply.
Key terms
- Cashback
- Cashback: 10% of net casino losses each week (Monday to Sunday), paid as cash with no wagering every Monday, up to $500 a week.
Full T&Cs apply. Please gamble responsibly.
Game availability varies by casino and country.
Themes:
Part of the Book of series.
How to play Book of Halloween (members only)
This game uses its own win-evaluation system. Check the in-game paytable for exactly how combinations are formed.
Book of Halloween is played on a 5×3 grid.
- Set your stake. Choose your total bet per spin between $0.10 and $100. Wins are paid as multiples of this stake.
- Check the paytable. Open the game's info screen to see what each symbol pays and the exact rules for this version.
- Spin. Each spin's result is decided by a certified random number generator, independent of previous spins.
- Trigger the bonus. Land the required scatter symbols to start the free spins feature.
The full Book of Halloween guide: how winnings work, 3 features and 3 strategy tips
- Your stake plan: a $50 budget → about $0.17 a spin (high volatility)
- What 96.21% RTP costs per $100 wagered: $3.79 on average
- 3 features explained: free spins, expanding reels, gamble feature
- Stake plans for $20 to $250 budgets, checked against the $0.10 minimum bet
- Strategy tips and a session planner for Book of Halloween
Free · no card · 18+ only
Never sold · export or delete any time · What do members get?
How winnings work (members only)
What 96.21% RTP costs per $100 wagered
What 96.21% RTP means
Expected return = stake × 96.21%
Over $100 of total bets, the long-run average loss is $3.79
RTP is a long-run average across millions of spins. Any single session can finish far above or below it, especially on a high volatility game.
The published hit frequency is 33%, meaning roughly one spin in 3.0 returns something — though many of those wins are smaller than the stake.
Features explained (members only)
3 features explained: free spins, expanding reels, gamble feature
Free spins
A bonus round of spins played at no cost to your balance, usually triggered by landing three or more scatter symbols. Wins during the round are added to your balance, and many games let you retrigger extra spins.
Expanding reels
The grid grows during play, adding rows or reels and increasing the number of ways or lines that can pay.
Gamble feature
After a win you can risk it on a double-or-nothing guess, such as the colour of a card. It does not improve the game's long-term return.
Strategy tips (members only)
- Size your stake to the volatility. High volatility concentrates the return in rare, large wins. Long losing runs are normal. Keep stakes small (around 1% of your session budget or less) so you can ride out the swings. A simple rule: bring at least 300 spins' worth of budget, so a $50 budget suggests a stake of about $0.17.
2 more tips and a session planner
- Bonus wagering: at 96.21% RTP, clearing $1,000 of wagering costs about $37.90 on average. Check the bonus terms, as some casinos exclude specific games. Run your numbers in the wagering calculator.
- Set limits before you spin. Decide your loss limit and session time in advance and stop when you reach either. No pattern or betting system changes the outcome of a spin.
More on this in slot RTP and volatility explained and bankroll management.
Does it fit your budget? (members only)
Stake plans for $20 to $250 budgets, checked against the $0.10 minimum bet
For high volatility we suggest a budget of at least 300 spins. This is what that means for Book of Halloween (bets from $0.10 up to a maximum bet of $100).
| Budget | Stake a spin | Bet range | Average cost of 300 spins |
|---|---|---|---|
| $20 | $0.07 | Below the $0.10 minimum bet | $0.76 |
| $50 | $0.17 | Fits | $1.90 |
| $100 | $0.33 | Fits | $3.79 |
| $250 | $0.83 | Fits | $9.48 |
Averages only: a short session can end far above or below them. Set a loss limit before you play.
Questions
Frequently asked questions
Who makes Book of Halloween?
Book of Halloween is developed by Inspired Entertainment and was released in 2019.
What is the RTP of Book of Halloween?
The default RTP of Book of Halloween is 96.21%.
Is Book of Halloween high volatility?
Book of Halloween is rated high volatility. High volatility concentrates the return in rare, large wins.
Can I play Book of Halloween for free?
Not on GambGenius at the moment: we don't list an official Inspired Entertainment demo of Book of Halloween.
Does Book of Halloween have a bonus buy?
No bonus buy is listed for Book of Halloween in the sources we checked.
Where this data comes from
- inseinc.com Provider
- slotcatalog.com Slot database
Specs come from the provider's own site and 1 independent slot database. Casinos can run lower-RTP versions, so always check the game rules before you play.
Game artwork © Inspired Entertainment, shown to identify the game.
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