Book of Oil Slot Review

Book of Oil is an online slot game developed by Endorphina, featuring an adventurous theme set in the world of oil exploration. Here’s a review of the game:


  • Theme: Book of Oil features an oil exploration theme, with symbols like oil rigs, barrels, maps, and high-value playing card symbols.
  • Reels and Paylines: The game typically has 5 reels and 3 rows, with 10 paylines.
  • Symbols: Symbols in the game are inspired by the theme of oil exploration, with various icons related to the industry.
  • Wild/Scatter Symbol: The Book symbol serves as both the wild, substituting for other symbols to form winning combinations, and the scatter, triggering the free spins bonus round.
  • Free Spins Bonus: Landing three or more Book symbols triggers the free spins bonus round, awarding 10 free spins. During the bonus round, a special expanding symbol is randomly chosen, which can expand to cover the entire reel and increase the chances of winning big.
  • Gamble Feature: After any win, players have the option to gamble their winnings in a card guessing game to double or quadruple their winnings.

Summary: Book of Oil offers players an exciting and unique slot experience with its oil exploration theme and engaging gameplay. The game’s graphics and animations are typically well-crafted, creating a sense of adventure and discovery. The bonus features and potential for big wins make it an enjoyable choice for players looking for a slot game with an adventurous theme. If you enjoy exploration themes or are intrigued by the world of oil, Book of Oil is worth a try.

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