Game Information
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Provider
Spinomenal
Type
Slots
Theme
Halloween
Reels
5
Min Bet
0.01
Max Bet
10
Max Win per Spin
500000
Restrictions
GB
Book of Skulls Slot: Comprehensive Data Analysis
Core Game Specifications
| Attribute | Value |
|---|---|
| Developer | Spinomenal |
| Release Date | 26 August 2021 |
| Theme | Pirates, Adventure |
| Layout | 5×3 |
| Paylines | 10 |
| Bet Range | 0.10–100 |
| Core Mechanics | Free Spins with expanding symbol, Wild/Scatter Book symbol, Bonus Buy feature, Expanding Symbols |
| Technology | HTML5 and JavaScript |
| Compatibility | Desktop and mobile |
Mathematical & Payout Model
Return to Player (RTP)
88.94 %–96.14 %
Volatility
Medium To High
Max Win Potential
5000x
Symbols & Paytable Hierarchy
| Tier | Symbol(s) | Function & Value |
|---|---|---|
| Low Tier | 10, J, Q | Provides small, frequent wins to maintain gameplay. |
| Mid Tier | K, A | Thematic items offering moderate payouts. |
| Wild | Book of Skulls symbol | Acts as a substitute / feature trigger per game rules. |
| Scatter | Book of Skulls symbol | Triggers free spins / bonus round when enough appear. |
Book of Skulls Bonus Features Mechanics
| Feature | Trigger | Initial Award | Core Mechanic | Enhancement/Retrigger |
|---|---|---|---|---|
| Free Spins with expanding symbol | Three or more Book symbols | A random symbol expands to cover reels during free spins | Retrigger possible via additional Book symbols | |
| Bonus Buy | Player choice | Allows direct purchase of free spins |
Frequently Asked Questions (FAQ)
| How do I trigger free spins? | Land three or more Book of Skulls symbols to activate free spins. |
| What does the Book symbol do? | It acts as both wild and scatter and triggers free spins. |
| Can I buy free spins? | Yes. The game offers a bonus buy feature to purchase free spins directly. |
| What is the RTP of the game? | The RTP ranges from 88.94 % to 96.14 % depending on version. |
| What is the maximum win? | The maximum win is 5000× your bet. |
| Is the game mobile friendly? | Yes. The game runs on both desktop and mobile devices. |
| What is the volatility level? | The volatility is medium to high. |
Book of Skulls Performance Summary: Strengths vs. Weaknesses
Strengths
- High maximum win potential
- Engaging pirate theme
- Bonus buy option for free spins
- Expanding symbol mechanic adds excitement
Weaknesses
- RTP can be below average depending on version
- Volatility may be high for risk‑averse players
Overview
Book of Skulls is a pirate‑themed video slot by Spinomenal. It features a 5×3 layout with 10 paylines, a free spins round with expanding symbols, a buy‑feature to trigger free spins, and a wild/scatter Book symbol. The RTP ranges from 88.94 % to 96.14 % depending on version. The slot offers a maximum win of 5000× the bet.
Rachel Pine is our slots expert who has worked in the online gambling industry for 10+ years. Over the course of her career, Rachel has reviewed more than 30,000 slots.
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