Book of Oil
by Endorphina - play on desktop
About Book of Oil
Book of Oil takes you to an oil-themed world where the main symbol is a mysterious book. Land three or more book symbols at once, and you unlock a free spins feature where things get more generous. The book symbol becomes extra valuable during these bonus rounds, expanding to cover entire reels and helping you hit bigger wins. The game keeps things straightforward, so you adjust your bet, spin, and watch the reels turn. It's a classic slot experience with a resource-extraction twist.
Game Features
- Book symbol acts as both scatter and wild
- Free spins triggered by three or more scatters
- Expanding symbols during bonus rounds
- Fixed paylines across base game
- Adjustable bet denominations
Where to find it
Search Book of Oil by name in the lobby. Most games come with a free demo if you want a feel for it before you put crypto down.
Pick your bet per spin, and check the paytable in-game to see what the symbols and bonuses pay. We take Bitcoin, Ethereum, USDT and more. Deposit, play, withdraw, all in crypto.
Play Book of OilMore Endorphina Games
Frequently Asked Questions
What happens when the Book symbol lands during the bonus round?
The Book symbol expands across reels during free spins, creating additional winning combinations beyond what appears in the base game. This expansion mechanic increases your chances of landing bigger wins during the bonus round.
How many Book symbols do I need to trigger free spins in Book of Oil?
Three or more Book symbols must land in a single spin to trigger the free spins bonus round. The Book functions as both scatter and wild, so it counts toward bonus activation regardless of position on the reels.
Can I adjust my bet in Book of Oil?
Yes, Book of Oil features adjustable bet denominations, allowing you to modify your stake before each spin according to your preferred wagering level.
How many paylines does Book of Oil have?
Book of Oil uses fixed paylines during base game play, meaning all available lines remain active on every spin and cannot be adjusted or disabled.
Does the Book symbol act differently than regular symbols in Book of Oil?
The Book symbol serves dual functions as both scatter and wild, making it the most valuable symbol in the game. It triggers free spins when landing in multiples and substitutes for other symbols to complete winning combinations.
