Book of 99

Book of 99 Book of 99
Game information
VolatilityMedium-High
Max winx12075
RTP99%
Release date04.05.2021
Game typeSlot
Provider Relax Gaming
RTP range99%
Volatility Medium-High
Hit frequency 29.83%
Bonus frequency N/A
Min bet0.1 EUR
Max bet100 EUR
Max win multiplierx12075
Max win value1 207 500 EUR
Layout 5*3
Lines10
FeaturesAutoplay, Books Mechanic, Expanding Symbols, Free Spins, Free Spins Retrigger, In-game Progress, Multiplier
VersionsPC, Mobile
Progressive jackpot No
Last updated17.04.2025
Play demo
Book of 99
8.2
GamblerID
Score
User Rating 8/10
(1 votes)
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Comments

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Book of 99 Slot Review

Book of 99 by Relax Gaming is another exciting slot game set in the world of ancient Greek mythology. It tells the story of Odysseus' journey back to his hometown of Ithaca after the Trojan War. Along the way, you'll face perilous trials, from being captured by a one-eyed Cyclops to resisting the deadly allure of the Sirens. All of this is wrapped in the familiar Book mechanic, which players either love or have grown a bit tired of, but let's take it step by step.

Book of 99 by Relax Gaming Slot Features

Book of 99 Info

The game grid is designed to reflect ancient Greek architecture, complete with marble columns. It features 5 reels and 3 rows, offering 10 ways to win. The game operates with an impressive 99% RTP, which is one of the highest you'll find in any slot game out there. The Volatility is medium-high (6 out of 10), and the betting range is quite flexible, starting from €0.1 up to €100 per spin.

Base Game

Book of 99 Free Demo

If you're curious but want to play it safe, we recommend starting with the demo mode to get a feel for the Game Without Any Risk.

Book of 99 Bonus Feature

Scatter Symbols

There are two ways to trigger the Free Spins feature in Book of 99. The classic way by landing 3 Wild Scatter symbols in a single spin. The collection method by filling the Collected Meter to 99, which happens as you collect Wild Scatters symbols over time. However, keep in mind that when Free Spins are triggered through the collection method, will be played using a bet size averaged from all bets placed while collecting the Wilds.

Free Spins Intro

Once activated, you'll receive 10 free spins, and a Special Expanding Symbol will be randomly selected. During Free Spins, this symbol can expand, and in addition to regular line wins, it will pay out across all 10 paylines, based on the number of symbols landed and their corresponding payout values.

Free Spin

Book of 99 Verdict

So, what's the final verdict? Book of 99 didn't gain popularity by chance, it's the result of a carefully crafted, well-balanced gaming experience. The exceptionally High RTP Slot and an impressive max win of x12,075 make it a standout choice for many players. Sure, collecting Wilds might not be the most thrilling mechanic, but this slot doesn't try to dazzle you with over-the-top features. And honestly, it doesn't need to.

Mega Win

Daniel Borg
Daniel Borg
Content Writer & Slot Reviewer

Symbols and Paytable

Symbol 1903
5x500
4x100
3x10
2x1
Symbol 1904
5x200
4x40
3x4
2x0.5
Symbol 1905
5x75
4x10
3x3
2x0.5
Symbol 1906
5x75
4x10
3x3
2x0.5
Symbol 1907
5x15
4x4
3x0.5
Symbol 1908
5x15
4x4
3x0.5
Symbol 1909
5x10
4x2.5
3x0.5
Symbol 1910
5x10
4x2.5
3x0.5
Symbol 1911
5x10
4x2.5
3x0.5
Symbol Wild and Scatter
Wild and Scatter

Common questions answered

Can I play Book of 99 slot for free in demo mode?

Absolutely, you can try the Book of 99 slot in demo mode, no account required. It gives you a chance to explore the slot's mechanics without any deposit. Best way to explore the game first, as it lets you try before you play for real.

Can I win real money on Book of 99 slot?

No, real money wins are only possible when you play at a licensed casino with real or bonus funds. Test mode is risk-free and does not pay out real money, so you won't lose or gain any cash.

What is the RTP and maximum win of the Book of 99 slot?

The RTP of Book of 99 is 99%. Greater return to player, the better your odds are. The biggest prize is limited to x12075 of your bet. The slot's volatility is rated as Medium-High, which affects how often and how big you win.

Can I play Book of 99 slot on mobile?

Yes, the Book of 99 slot works perfectly on mobile devices. Thanks to HTML5 technology, you can play instantly in your browser, whether you're on a smartphone or a tablet.

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