The Book of Amaterasu Free Demo Game
Theoretical RTP: 95.53%. RTP calculated based on 10,000,000 spins during January 2025.
Theoretical RTP Risk&Buy: 86.66%. RTP calculated based on 10,000,000 spins during January 2025.
The Mystery symbol is a wild symbol and substitutes for all symbols in a payline combination. 3, 4, or 5 Mystery symbols award 10, 15, or 25 free spins with a special symbol expansion feature. Mystery symbols can appear in both the main game and free spins.

Free spins are automatically awarded at the same bet they were won with. All payouts are determined according to the paytable. Additional free spins can be won during the current free spins series according to the general rules.
One special expanding symbol is randomly selected from the entire symbol pool, excluding the Riddle symbol. This special symbol remains special for the entire free spins sequence, including any additional free spins. The special symbol expands the reel where it appears and awards wins, just like a regular symbol, even on non-adjacent positions. The feature is only triggered during free spins and when enough special symbols are present to trigger a win.
The Special Expanding Symbol cannot be substituted with a Mystery Symbol to activate the Special Expanding Symbol feature.

The Risk’n’Buy feature in The Book of Amaterasu is offered to the player in the main game after every spin, regardless of whether they win or lose. Risk’n’Buy allows the player to either risk their current winnings and immediately proceed to the Free Spins feature with the offered special expanding symbol, or purchase the Free Spins feature with the offered special expanding symbol at a specified price and launch it immediately.
The player can freely choose whether to launch the offered Risk’n’Buy feature or continue the main game. If they choose to risk their current winnings, the winnings will be deducted from their balance as a bet. If they choose to purchase the Free Spins feature, the cost of this feature will also be deducted from their balance as a bet. Any free spins earned through Risk’n’Buy will be launched with the same bet they earned. Risk’n’Buy is not available in autoplay mode.

10 Lines. Only the maximum win per bet line is paid. All prizes are awarded for combinations from left to right, starting with the leftmost reel. Payouts depend on the current bet and change proportionally. The game is played with fixed bet lines. A failure voids all payouts and game results.










