Book of 99 Online Slot Logo

Book of 99 Slot Review, Free Play and Casinos

Released May 4, 2021
Slot Studio RelaXGaming
RTP 99.0 %
Volatility High
Theme Mythology
Reels 5
Rows 3
Paylines 10
Bonus Game Yes
Free Spins Yes (10)
Wild Yes
Scatter Yes
Multipliers No
Top Win x12075
Bet Size 0.10-100 EUR
Hit Freq. 29.83%

Book of 99 Demo Mode

Book of 99 is a RelaXGaming High volatility, 10 payways title (published on May 4, 2021). The RTP is 99.0% and the top win equals x12,075. Speaking about bonus features, this game goes with Bonus game, Free spins, Wild and Scatter.

Basic info

The slot studio of Book of 99 is RelaXGaming, well known by so numerous online casino players. This online slot is a quite modern release and was published on May 4, 2021. Mythology is implemented as the motif of Book of 99, namely the Ancient Greece myth about Cyclops.

RTP determines how much cash casinos levy you as a commission in the long term, and the nice news are that this game is very incredible in that sense as it comes with amazing RTP of 99.0% So to say, you are going to give as little money to casino websites as possible in the long run.

When it comes to the maximum available win, an aspect which internet casino gamers are so eager to learn, gambling on Book of 99 can bring x12075 of your total cost. Regarding the real world example, in case you bet 10 EUR per round the top available win is going to be 120750 EUR. Speaking about the top available win, Book of 99 is truly fantastic, and it surely stands out among other online slot machines in the online casino industry.

Book of 99: image of main menu

Betting options and layout

Book of 99 has 5 reelsx3 rows format, which is somewhat usual in video games. Hence, gambling on 5 reels games should be quite normal venture for the vast majority of online casino gamers, and the acclimatization to a new game will be seamless.

Payways affect overall gaming process pretty much notably, and on this game it equivalents 10 betways. This number of payways makes this video game quite usual as the absolute majority of games nowadays include similar number of betlines. One more thing to add about payways is that they are unchangeable and can not be set by gamblers.

When you get lucky, the wins will be awarded in succession from the leftmost reel to the rightmost reel only.

Book of 99 allows to select how much money you will wager. 0.10 EUR is the smallest wager on this slot when the highest bet is 100 EUR. Additionally as it occurs essentially on any new slot game, the betting size here covers all betways so you have nothing to be concerned about. So to say, this slot game is appropriate for players of any bankroll size.

Book of 99: image of winning

Is This Slot Volatile?

Volatility (variance) is very essential variable of any online slot machine and in this slot it is set at High degree. Such a degree will surely result in significantly more lingering losing periods. Nevertheless, you can expect much bigger winnings.

The winning hit frequency is 29.83% . Hence, the winnings are going to be provided at this pace long term.

About regular features

Multipliers didn't use to be so that usual, but currently it is relatively difficult to come across a slot without this exciting bonus feature. It is a little sad but Book of 99 does not go with Multipliers.

Wild symbol is applied in the gameplay of modern video games very often since players have been prefering it so much in the last decade. Book of 99 does go with Wild so the gamblers are going to be pleased. A picture of a mysterious books is the WIld symbol in this game.

Another great feature that internet casino gamblers are so ecstatic about is Free spins, no doubt about it. Book of 99 has got Free spins integrated. To win those free rounds you are supposed to hit Scatter symbols. The Scatter symbol of this game is depicted as mythical monster Cyclop. Just in case you were fortunate to hit 3 Scatters then 10 Free spins are going to be offered. More Scatters won't bring more free rounds.

What makes the gameplay markedly engaging is a bonus game being applied. So to speak, 99 levels meter implemented in the game. Once you have collected 99 Wilds and completed the meter, free spins will be triggered.

Furthermore, Book of 99 is not progressive implying that you can't expect truly fantastic jackpots on it.

Newer features

Book of 99 's gameplay is quite simple as it does not provide brand new features (specifically Colossal symbols, etc.). Some gamers will deem it disappointing. Though those who prefer more straightforward games are going to love it. On top of that, you are going to get a few old fashioned special features (Bonus game, Free spins, Wild, Scatter) in this game so you won't get dissatisfied.

Final thoughts

Summing up, here are the list positives and negatives of this slot.


  • Very high RTP (99.0%).

  • High volatility is a cool thing from the gamers' point of view actually.

  • You can win very huge in this game (x12075).

  • The gaming process is quite interesting as a result of some classic bonus features (Bonus game, Free spins, Wild, Scatter).

  • Nice graphics and sound.


  • The gaming is a little boring since there are no recent features.

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