Casino Bonuses
| Provider | Relax Gaming |
| Reels | 5 |
| Rows | 3 |
| Paylines | 10 |
| Bonus Rounds | 1 |
| Bet Range | 0.10 - 100.00 |
| Volatility | High |
| Max Win | 5,000x |
| Bonus Buy | No |
| RTP | 99% |
| Our Rating | 9.0 |
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Demo & Review
Demo & Review
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Demo & Review
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Demo & Review
Demo & Review
Demo & Review
Demo & Review
Game Overview
The destination is Ancient Greece for the Book of 99 slot from provider Relax Gaming. Join the mythological characters in this classic 5 reel and 10 payline video slot, where you’ll be playing with a high RTP of 99% and be in with a chance of winning up to 5,000x your bet.
Expect the entertainment levels to crank up a notch when 3 or more scatters land in view. You’ll receive a random expanding symbol to play the free spins round with, where you can also re-trigger the bonus multiple times.
Find out more about this popular genre of slot that has not just added the twist of giving you an insanely high RTP, but also a secondary way to trigger the free spins. Read our full slot review of Book of 99 and don’r forget to try out the free play demo that can be accessed on desktop, tablet, and mobile devices.
Book Of 99 Slot Theme, Stakes, Pays & Symbols
Book of 99 takes us deep into Greek Mythology, where the setting for the game switches between a dusk filled sky looking out onto a lake, into a beautiful ancient city with splendid architecture. The reels sit between 2 Ionic columns that are decorated in flowers, whilst the eerie soundtrack to the game adds an extra layer of mystery as you begin your adventure.
Whilst initially using standard royal symbols jack through to the ace for the lower value wins on the paytable, Book of 99 does continue with the Greek theme as the premium value pays are represented by Lamia, a Cyclops, Helen of Troy, and Hercules, where a 5 of a kind win will pay 75x, 75x, 200x, and 500x respectively. The book symbol on the game doubles up as both the scatter, and the wild symbol.
Spinning your way into the ancient past on Book of 99 can cost just €0.10 a spin, with the maximum bet on the game reaching €100 a play. As we mentioned in the introduction, the RTP of the game is a staggering 99%. This is the highest percentage payout that we have come across when playing an online slot, and represents outstanding value for your money.
Book Of 99 Slot Base Game
Book of 99 is played across a standard 5 reel format with 10 fixed paylines in place. This falls in line with what you’d expect to see on any of the expanding symbol slots, such as those within the Book of Ra series of games. There is however one significant difference in Book of 99, and that is the wild collection meter to the left of the reels.
Every time that a wild book scatter symbol lands in view, the meter will increment by 1. When you collect 99 of these symbols, then the bonus feature will instantly trigger and award you with 10 free spins.
Book Of 99 Slot Free Spin Feature
As well as the wild scatter collection method that we have just mentioned, you can also trigger the free spins on Book of 99 by landing 3 or more of the scatter symbols in view at the same time. This will also award you with 10 free spins to begin the bonus with.
Before the free spins get under way, you will firstly be awarded a random symbol from the paytable to act as your expanding symbol. Once this has been decided, then the free spins will commence.
Now that you have your expanding symbol, you’re hoping to see it land on as many of the reels as possible. If this can be achieved then the symbols will expand the full length of the reels and pay you over 10 paylines.
If you were awarded one of the lower value symbols, then you will need a minimum of 3 of them to land to cause a reel expansion. If however you are playing with a premium symbol, then you will only require a minimum of 2 to land for a reel expansion to take place.
Additional free spins can be added to your current total via a re-trigger. Land 3 or more scatters in view and 10 extra spins will be awarded. There are no limits as to how many re-triggers you can achieve.
Book Of 99 Slot Review Final Thoughts
There are plenty of ” Book ” style games out there, but none that quite live up to Book of 99 from Relax Gaming. Yes on the face of it the slot may just seem like your standard run of the mill Book of Dead game, but in an online slot world where RTP seems to be decreasing, getting to play one with of 99% really is a novelty, and one that we very much enjoyed.
We also liked the fact that when you trigger the free spins, your collection meter does not reset. But the icing on the cake for us was when we had 97 wilds collected and the feature triggered organically. After it had ended the 3 books on the screen went into the meter and gave us a back to back bonus. This is a game that you just have to try out, and we think you’ll love it.
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