Game Information
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Provider
Endorphina
Type
Slots
Theme
Book of
Reels
5
Min Bet
0.01
Max Bet
Yes
Max Win per Spin
50000
Restrictions
AU,FR
Book of Oil Slot: Comprehensive Data Analysis
Core Game Specifications
| Attribute | Value |
|---|---|
| Developer | Endorphina |
| Release Date | September 2021 |
| Theme | Oil production, Luxury, Money |
| Layout | 5×3 |
| Paylines | 10 |
| Bet Range | 0.01–100 |
| Core Mechanics | Book symbol as Wild and Scatter, Free Spins with expanding symbol, Bonus Pop (buy feature), Gamble feature |
| Technology | HTML5, mobile‑friendly |
Mathematical & Payout Model
Return to Player (RTP)
96.05%
Volatility
Medium
Max Win Potential
10000x
Symbols & Paytable Hierarchy
| Tier | Symbol(s) | Function & Value |
|---|---|---|
| Low Tier | 10, J, Q, K, A | Provides small, frequent wins to maintain gameplay. |
| Mid Tier | Barrels, Cash stacks, Oil derricks | Thematic items offering moderate payouts. |
| High Tier | Oil tycoon | Highest paying symbols. Top hits available with full combinations. |
| Wild | Book | Acts as a substitute / feature trigger per game rules. |
| Scatter | Book | Triggers free spins / bonus round when enough appear. |
Book of Oil Bonus Features Mechanics
| Feature | Trigger | Initial Award | Core Mechanic | Enhancement/Retrigger |
|---|---|---|---|---|
| Free Spins with expanding symbol | 3+ Book symbols (Scatter) | 10 free spins | A random symbol expands when enough land to form a win, covering reels regardless of position | |
| Bonus Pop (Buy Feature) | Player choice | Allows purchasing entry into free spins round directly | ||
| Gamble feature | After any win | Card‑based double‑or‑nothing game, up to 10 successive doubles |
Frequently Asked Questions (FAQ)
| What is the RTP of Book of Oil? | The RTP is approximately 96.05%. |
| What is the maximum win? | The maximum win is 10,000× your stake. |
| Can I buy the free spins feature? | Yes, via the Bonus Pop feature you can purchase entry into the free spins round. |
| What does the Book symbol do? | The Book symbol acts as both Wild and Scatter, substituting for other symbols and triggering free spins. |
| Is there a gamble feature? | Yes, after a win you can play a gamble game to double your winnings up to 10 times. |
Book of Oil Performance Summary: Strengths vs. Weaknesses
Strengths
- High maximum win potential (10,000×)
- Engaging expanding symbol free spins
- Option to buy bonus round
- Mobile‑friendly HTML5 design
Weaknesses
- Limited to 10 paylines
- Relatively few bonus features beyond free spins and gamble
Overview
Book of Oil is a 5‑reel, 3‑row video slot by Endorphina, released in September 2021. It features 10 adjustable paylines, medium volatility, and an RTP of approximately 96.05%. The Book symbol acts as both Wild and Scatter, triggering free spins with a random expanding symbol. A Bonus Pop feature allows purchasing the free spins round, and a gamble feature lets players double winnings up to 10 times.
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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