Book of Games 20

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Rules and Gameplay

The Book of Games 20 slot machine by Thunderkick offers a thrilling Egyptian-themed adventure on a 5×3 reel layout. This game is designed to cater to a variety of players, with bets ranging from as little as $0.01 to $200. The expanded reel system now boasts 20 win ways, inviting players to explore the mysteries of ancient Egypt. Gameplay is straightforward: winning combinations are formed by landing 2 or 3 matching symbols on adjacent reels, starting from the leftmost reel. The game’s simplicity, combined with its engaging theme, makes it accessible and enjoyable for all types of players.

Bonus Features

Book of Games 20 is packed with exciting features that enhance the gaming experience. Key features include:

  • Free Spins: Triggered by landing 3+ book symbols, awarding players with 10 free spins and a fixed cash prize. The free spins feature includes an expanding bonus symbol for increased winning potential.
  • Expanding Symbols: During the free spins, a selected symbol can expand to cover the reels, increasing the chance of a win.
  • Gamble Feature: After any win, players have the option to gamble their winnings in a double-or-nothing game, guessing the color of the next drawn card.

These bonus features not only provide additional ways to win but also add an element of strategy to the game, as players decide when to take risks and when to secure their earnings.


The symbols of Book of Games 20 draw heavily from its Egyptian theme, providing a rich visual experience. They include:

  • Low-paying symbols: Classic A-J card ranks.
  • High-paying symbols: Scarabs, statues, pharaohs, and explorers.
  • Special symbols: Book symbols act as both Wild and Scatter, substituting for other symbols and triggering the Free Spins feature.

Each symbol has been carefully designed to fit the theme, with high-paying symbols offering a glimpse into the treasures and mysteries of ancient Egypt.


Symbol 3 Symbols 4 Symbols 5 Symbols
Low-paying (A-J) 5x Up to 7.5x N/A
High-paying (Scarabs, Pharaohs) 37.5x Up to 250x N/A
Book (Wild/Scatter) 2x (bet) 20x (bet) 200x (bet)


Book of Games 20 enhances the gameplay with 20 paylines, offering players more ways to win. Each payline is a potential winning combination, providing numerous opportunities for players to land winning sequences across the reels. This expanded payline system invites players to delve into the game’s depths, exploring every chance for victory amidst the sands of Egypt.

Pros & Cons

Pros Cons
Lovely retro visuals and immersive Egyptian theme Below-average RTP at 95.58%
Free Spins feature with expanding symbols Poor maximum win potential of 1,000x bet
Flexible betting range suitable for all types of players Lack of innovation in game mechanics

Minimum and Maximum Bet

The betting range in the Book of Games 20 slot machine is designed to accommodate a wide variety of players, with a minimum bet of $0.01 when playing with only one payline. However, to fully utilize all 20 paylines, the minimum bet increases to $0.20. The maximum bet that can be placed in the game is $200, making it accessible for both high rollers and players on a budget. This wide betting range allows players to tailor their gambling experience according to their preferences and bankroll.

Game Jackpot

The maximum win in the Book of Games 20 slot is capped at 1,000 times the player’s bet, which, while not groundbreaking, offers a decent target for players. The game operates on a high variance model, indicating that wins might not be frequent but can be significant when they do occur. The Return to Player (RTP) rate is slightly below average at 95.58%, reflecting the game’s balance between risk and reward. This combination of high variance and RTP gives players a clear idea of what to expect in terms of payouts.

About Provider

ThunderSpin, the developer behind Book of Games 20, was founded in 2017 as part of Boss Gaming Solutions. Despite being relatively new to the gaming industry, ThunderSpin has made a name for itself with a portfolio of over 28 unique and engaging online slots. The company prides itself on offering high RTP rates of up to 97%, a testament to its player-friendly approach. Based in Malta and Ukraine, ThunderSpin’s games are security-certified by respected entities like GLI and iTech Labs, ensuring a safe and fair gaming experience. Their focus on quality visuals, innovative themes, and mobile compatibility positions ThunderSpin as a promising player in the slot game development arena.

How To Play

  • Start by selecting the number of paylines you wish to play with. In Book of Games 20, you can choose up to 20 paylines for maximum winning chances.
  • Adjust your bet size according to your budget. The minimum bet starts at $0.01 for one payline, going up to $200 for all 20 paylines.
  • Review the paytable to understand the value of each symbol and the game’s bonus features.
  • Press the spin button to start the game. Winning combinations are made by landing matching symbols on active paylines from left to right.
  • Look out for the book symbols, which serve as both Wild and Scatter. Landing three or more will trigger the Free Spins feature.
  • During the Free Spins, a random symbol is chosen to expand across the reels, increasing your chances of a big win.
  • Utilize the Gamble feature after any win for a chance to double your earnings by guessing the color of the next card.


Book of Games 20 by ThunderSpin is a nostalgic nod to classic Egyptian-themed slots, bringing familiar gameplay with a twist of expanding paylines and engaging features. While it may not break new ground in terms of innovation, its charming visuals, flexible betting range, and the allure of free spins with expanding symbols provide a solid gaming experience. The game’s below-average RTP and maximum win potential may deter some players, but for fans of the genre or those looking for a mix of traditional and modern slot mechanics, Book of Games 20 offers an enticing adventure into the mysteries of ancient Egypt.