Book of Eye

Last Updated on June 6, 2023 by LTC Casino Editorial

Book of Eye is one of the Bitcoin slot machine games by Onlyplay.

The slot features 5×3 reels, 10 paylines, and a bonus game purchase option, while the maximum payout per spin can reach x55,000 of the bet.

Return to Player (RTP): 95.22%

Features and main game mode

1. Winning combinations

High-value symbols pay from 2 of a kind, and low-value symbols pay from 3.



2. Wild symbol

Wild substitutes for all symbols and functions as a Scatter, triggering the bonus game.

The Wild symbol has its own value:

  • 3 Wild symbols = x2 of the bet
  • 4 Wild symbols = x20 of the bet
  • 5 Wild symbols = x200 of the bet

On the active payline:

  • 2 Wild symbols = x1 of the bet
  • 3 Wild symbols = x10 of the bet
  • 4 Wild symbols = x100 of the bet
  • 5 Wild symbols = x500 of the bet

3. Reel respin

After each spin, the player can optionally respin any reel, thus getting the opportunity to improve the winning combination or get a bonus game.

The respin price is calculated based on the symbol position on the reels at the current moment.

Bonus game mode

  1. Buy Bonus

Similar to other bonus buy slots, the player can buy the bonus game at any point.

The purchase price is x110 of the bet.

For example: a $1 bonus game costs $110.



2. Regular trigger

The bonus game starts when 3, 4, or 5 Wild symbols appear on the reels in the main game mode.

3. Number of free spins

The number of free spins is set at 10.

4. Symbol expansion

When the bonus game starts, a random symbol is selected as an expanding one.

Payouts for such symbols are awarded regardless of whether they appear on consecutive reels or not.

5. Special Wild and multiplier

In the bonus game mode, the Sun symbol can appear, which remains on the reels until the end of the bonus game.

The Sun symbol plays as Wild and also increases the bonus game multiplier by 1 point per spin.



6. Extra free spins and extra symbols

When 3 or more Wild symbols appear, the player receives 10 additional free spins.

Play Book of Eye with Crypto and Bitcoin