Book of Oil
- Paylines
- 10
- Volatility
- High
- Return to Player (RTP)
- 96.0%
- Buy Bonus Feature
- No
- Play for Free
- Yes
Book of Oil brings an oil-tycoon theme to a 5x3 setup, with the Book symbol pulling double duty as both Wild and Scatter while Bonus Pop and free spins drive the action. Its standout feature is the 10 free games triggered by three Scatters, where a randomly chosen expanding symbol can cover positions on enabled paylines and even retrigger more spins. Base play revolves around landing premium tycoon and industry symbols across 10 lines, then shifting into the bonus round where expanding symbols create broader combinations and bigger swings.