Book of Unseen

“Book of Unseen” is a mystical, occult-themed slot game that immerses players in a world of hidden knowledge and ancient secrets. The game is set against the backdrop of a dimly lit, ancient temple, with flickering candles casting eerie shadows. Swirling smoke and mystical symbols add to the mysterious ambiance.

Traditional playing card symbols (Ace, King, Queen, Jack, 10) also appear on the reels, adorned with occult-themed patterns to fit the overall aesthetic.

Core Game Mechanics

“Book of Unseen” is a 5-reel slot with 10 fixed paylines. The game offers a wide betting range, from 0.1 to 1000.00 per spin, accommodating both casual players and high rollers.

Wins are paid from left to right on active paylines, with the exception of scatter symbols, which pay regardless of their position on the reels. The mysterious book symbol serves as both a wild and a scatter, substituting for all other symbols and triggering the bonus feature when three or more appear anywhere on the reels.

The game's long-term theoretical return to player (RTP) is 96.20% with standard play, and slightly higher at 96.21% when using the Bonus Buy feature.

Bonus Features

Free Spins Bonus: The main bonus feature of “Book of Unseen” is the Free Spins Bonus, triggered by landing three or more book symbols anywhere on the reels. The number of free spins and guaranteed expansions depends on the number of triggering symbols:

• 3 book symbols: 4 guaranteed expansions
• 4 book symbols: 6 guaranteed expansions
• 5 book symbols: 10 guaranteed expansions

At the start of the bonus, one regular symbol is randomly chosen to become an Expanding Symbol. After each free spin, if the chosen Expanding Symbol appears on the reels and can form a winning combination, it expands to cover the entire reel. This expansion occurs regardless of the symbol's position on the payline, potentially leading to significant wins.

The bonus continues until all guaranteed expansions have been used. Spins that don't result in an expansion don't count towards the remaining expansions, potentially extending the bonus round.

The Free Spins Bonus can be retriggered by landing additional book symbols during the feature, adding more guaranteed expansions up to a maximum of 99 per bonus round.

For players who don't want to wait for the bonus to trigger naturally, “Book of Unseen” offers a Bonus Buy feature. By paying 100 times the total bet, players can instantly access the Free Spins Bonus. When purchased, the bonus is triggered with a random draw of 3, 4, or 5 book symbols, determining the number of guaranteed expansions.

A notable aspect of “Book of Unseen” is its guaranteed expansions mechanic in the Free Spins Bonus. Unlike many similar “book” slots where expansions occur randomly, this game ensures a minimum number of expansions based on the triggering symbols. This feature provides players with a guaranteed level of excitement and potential for significant wins during the bonus round, while still maintaining an element of unpredictability in terms of which symbol will be chosen to expand.