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Relax Gaming
2.9
243 Ratings
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Book of 99 Slot Review
The Book of 99 slot machine is an online casino game by Relax Gaming that was inspired by Greek mythology. All the action takes place on a 5x3 grid with 10 static paylines. The ancient book of 99 functions as both the wild and scatter, triggering 10 free spins and substituting for all other symbols.
Game Info
Return to Player
99
Volatility
High
Provider
Relax Gaming
Autoplay
Bonus Buy
Bonus Rounds
Cascading Reels/Avalanche Feature
Cluster Pays
Expanding
Free Spins
Gamble
Jackpot Slots
Megaways
Mobile
Multiplier Symbols
Mystery
Scatter Symbols
Spreading
Stacked
Sticky
Number of Paylines
10
Layout
Min Bet
0.1
Max Bet
100
Release Date
5/31/2021
Last Update
2/28/2025
About Relax Gaming Game Provider
Other Games from Relax Gaming
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Begin Your Odyssey
Play the Book of 99 slot online and embark on an epic Greek odyssey, encountering mythological monsters along the way. This title was developed by Relax Gaming, who is an expert in producing video slots with top-notch graphics. The symbols in this casino game take the form of gruesome ogres and wicked harpies, valiant heroes and cunning sorceresses.
Rewriting Ancient History
You have the option to play Book of 99 for free or real money. To help you get started, here are a couple of fantastic no deposit bonuses that you can use! Betting options in this casino game range from 0.10 to 100.00 coins per spin. The biggest win available in the Book of 99 slots game is x5000 your wager and the volatility is very high. We were incredibly impressed by the RTP, which is 99% – much better than average!
Face Mythological Monsters
The sacred scripture is the most important symbol in the Book of 99 online slot. Not only does this book act as the wild – replacing every other symbol in the game – but it also functions as the scatter. So, whenever 3 or more books appear on the screen, 10 free spins are triggered! During these free spins, a special expanding symbol will be randomly selected, which helps you to land additional wins. You can also unlock free spins by filling up the meter on the left-hand side of the screen.
Symbol
Two on a Payline
Three on a Payline
Four on a Payline
Five on a Payline
Greek Hero
1x
10x
100x
500x
Sorceress
0.5x
4x
40x
200x
Ogre, Harpy
0.5x
3x
10x
75x
A, K
-
0.5x
4x
15x
Q, J, 10
-
0.5x
2.5x
10x
Explore Ancient Greece
Like many other online casino games, the Book of 99 slot machine draws inspiration from Ancient Greece. If you fancy delving a little deeper into the mythology, why not play the Zeus online slot by WMS ? In this game, you can meet the Greek gods and potentially win lucrative prizes with the free spins feature. The Medusa slot machine by NextGen Gaming is also worth trying out. The biggest payout is x5000 your total wager and there is a Pegasus bonus feature with instant wins, too!
Are You Ready?
The Book of 99 online slot is truly epic. The theme is incredibly well-executed, creating an immersive experience. We loved the fact that the scatter and wild were the same symbol, increasing the win potential of each spin. This is reflected in the game’s outstanding RTP of 99%!
FAQ
Where can I play the Book of 99 slot demo?
We have the demo of the Book of 99 slot here on VegasSlotsOnline. This allows you to play the game for free, so you can get used to the mechanics before playing for money.
Where can I find a trusted casino to play the Book of 99 slot machine?
We have a list of safe online casinos on our website. Use one of these casinos to play the Book of 99 slot machine and your money should be perfectly secure!
Can I play the Book of 99 slot with Bitcoin?
The Book of 99 online slot can accept cryptocurrencies as payment. However, you will need to play this game on a Bitcoin casino, as some operators don’t support this deposit method.
Why should I play the Book of 99 slot machine?
The Book of 99 slot machine is one of the best online slots with a Greek mythology theme that we have ever played. Its RTP is an outstanding 99%, which is much higher than average.
Is the Book of 99 online slot available on mobile?
If you love mobile gaming, then you’re in luck! The Book of 99 online slot has been optimized for all platforms, so you can enjoy this title on your mobile, computer, or tablet.