Book of Doom is one of the Bitcoin slot machines by Belatra Games.
The slot features 5×3 reels, 10 paylines, and a bonus game buy option, while the maximum payout per spin can reach x5,000 of the bet.
Return to Player (RTP): 95%
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 replaces any symbols and functions as a Scatter symbol triggering the bonus game.
Wild 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
Bonus Game Mode
- Buy Bonus
Since it is one of bonus buy slots, the player can buy a bonus game at any point.
The price is equal to x88 of the bet.
For example: a $1 bonus game costs $88.
2. Regular trigger
The bonus game starts when 3, 4, or 5 Wild symbols appear in the main game mode.
2. Number of free spins
The number of free spins is set at 10.
The player can win additional free spins.
3. Expanding symbols
When the bonus game starts, a random symbol is designated as an expanding one.
Payouts for such symbols are awarded regardless of whether they appear on adjacent reels or not.
4. Extra free spins
When three or more Wild symbols appear, the player wins ten additional free spins.
