Book of 99 Slot Machine Review: All Display (Relax Gaming)

Book of 99 Slot

Book of 99 slot is a slot game by Relax Gaming that features a classic Egyptian theme. The game has a simple yet effective layout with an impressive display of graphics and sound effects. 

The background of the game is a view of the pyramids in the distance, while the reels are decorated with various Egyptian symbols such as the Eye of Horus, the Ankh, and various gods and goddesses. The game is set to an upbeat soundtrack that keeps the energy high and keeps players engaged throughout their gameplay.

Reels and Gameplay

Book of 99 slot has five reels and three rows, with ten paylines. Players can choose their bet size from a range of options, starting at €0.10 up to €100 per spin, making it accessible to both casual players and high rollers alike. 

The game has a high volatility, which means that while wins may be less frequent, they can be larger when they do occur. The game also has an impressive RTP of 99%, which is significantly higher than the average slot game, making it a popular choice for many players.

Symbols and Features

The symbols in Book of 99 slots include the standard playing card values of 10, J, Q, K, and A, as well as the higher-paying symbols of various Egyptian gods and goddesses. The most valuable symbol is the explorer, which can pay up to 500 times the player’s original bet if five of them land on a payline. 

The game also features the Book of 99 symbol, which acts as both a wild and a scatter symbol. When it lands on the reels, it can substitute for any other symbol to create a winning combination, and it can also trigger the free spins bonus round.

Free Spins Bonus Round

To trigger the free spins bonus round, players must land three or more Book of 99 slot symbols anywhere on the reels. Players are then awarded ten free spins, and a special expanding symbol is randomly selected for the duration of the bonus round. If this symbol appears on the reels during the free spins, it will expand to cover the entire reel, potentially creating multiple winning combinations. The free spins bonus round can be retriggered by landing three or more Book of 99 symbols during the bonus round, potentially leading to even more free spins and even bigger payouts.

Buy Feature

Book of 99 slot  also features a Buy Feature, which allows players to instantly trigger the free spins bonus round by paying a set fee. This can be useful for players who are eager to experience the excitement of the bonus round without having to wait for it to trigger naturally. However, it is important to note that using the Buy Feature can be expensive, and there is no guarantee that it will lead to a big payout.


Overall, Book of 99 slot is an excellent slot game that is sure to appeal to players of all skill levels. With its impressive graphics, engaging soundtrack, and high RTP, it is easy to see why this game has become such a popular choice among online casino players. 

The game’s free spins bonus round and Buy Feature add an extra layer of excitement to the gameplay, while the high volatility ensures that wins can be large and rewarding. Whether you are a fan of Egyptian mythology or simply enjoy playing high-quality slot games, Book of 99 is definitely worth checking out.

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