Book of 99 von Relax Gaminga

Sometimes developers dare to do something totally unusual or even innovative in order to ultimately outperform the competition. With Book of 99, Relax Gaming has taken exactly this step. At first glance, the slot may look like a typical book slot with a Greek mythology theme, but it offers an almost unbelievable RTP of 99%.

The game is spun on a classic 5 reel and 3 row layout with a total of 10 fixed paylines. When it comes to gameplay and slot features, there is a colorful mixture of book wild/scatter symbols, expanding symbols and of course a free spins round, in which theoretical top prizes of up to 10,000x can be won. At the same time, the slot has an extremely high volatility and, as already mentioned, an absurd payout rate of 99%.

Graphically, the developers have opted for an extremely successful cartoon-like style and a rather spooky soundtrack in the background. The reels, embedded by marble pillars, are set against a rustic nocturnal sea backdrop. Symbols include but are not limited to A through 10 Royals and a quartet of premium premium symbols in the form of a Lamia, Cyclops, Male and Female Hero symbols. The Book symbol acts as both a wild and a scatter symbol.

Book of 99 actually internalizes everything that makes a good slot, a great look, fun features and an outstanding math model. In addition, the slot boasts an almost unbeatable RTP of 99%. No other slot can hold a candle to Relax Gaming here. Everyone has to decide for themselves how realistic that sounds, but you can have a lot of fun with the slot anyway.


Minimum bet: €0.10
Maximum bet: €10
Payout rate: 99%
Max win: 10000x

Free Spins

In terms of gameplay, Book of 99 has features that are typical of the genre. The Book hybrid symbol can be used as either a wild or a scatter symbol.

As a wild, it can substitute for any other symbol for a winning combination. However, it is even more useful as a scatter symbol, because 3 or more on the reels initially trigger 10 free spins. At the beginning, one symbol is randomly selected and converted into a special expanding symbol. On any spin, this special symbol can take up the entire reel. In addition, thanks to the pay-all-ways feature, it does not have to be right next to each other for a winning combination.

You can retrigger the free spins with 3 or more book symbols. Interestingly, the free spins can also be triggered by the so-called Wild Collection System. Namely, in the base game, each normal Wild symbol is collected, slowly filling a meter next to the reels. After 99 wilds have been collected, the free spins round is activated and we receive 10 free spins.


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