Book of 99 Slot - Demo & Review

Book of 99 slot cover image
Play for Free

Best Casinos to Play Book of 99 and Win Real Money!

Immerse yourself in the exhilarating world of Book of 99, expertly designed by Relax Gaming. Offering both captivating gameplay and bountiful rewards, it's a slot game you won't want to miss. Explore top casinos and enhance your chances of winning big!

Max Bonus
Max bonus

Embark on an ancient adventure with the Book of 99 slot review, a captivating journey crafted by Relax Gaming. With its enchanting Greek mythology theme, this online slot game enthralls players with its beautifully designed characters and enticing backdrop, promising a legendary quest for treasure amidst the pantheon of the gods.

Book of 99 doesn't just lure with its engaging slot theme; it introduces a plethora of unique slot features that sets it apart in the realm of free demo slots. Offering an immersive experience with high RTP and the chance for a max win through its fascinating mechanics, players can acquaint themselves with its offerings via the free demo, ensuring they're ready for the epic journey ahead.

Relax Gaming: The Slot Provider Behind Book of 99

Relax Gaming stands tall as a renowned slot provider in the online casino world, acclaimed for delivering high-quality online slot games that mesmerize a global audience. Their commitment shines through in Book of 99, an exemplar of their work, showcasing Relax Gaming's flair for creating story-rich themes paired with thoroughly engaging gameplay. This slot encapsulates their promise for fair and reliable gaming, making them a go-to for thrilling and trustworthy slot experiences.

Book of 99 Slot Specifications: RTP, Volatility, Max Win & Theme

Book of 99 is structured with a classic 5-reel configuration, enriched with 10 fixed paylines that pave the way for players to win. Its sharp mechanics offer a robust number of ways to secure victories, framing the gameplay within a familiar yet distinct slot architecture.

In comparison, Pragmatic Play's 'Gates of Olympus' shares a mythological theme but presents a different reel experience with cascading wins and a 'pay anywhere' system. While Gates of Olympus features a 6x5 grid, it also captures the essence of ancient storytelling akin to Book of 99, offering players a unique set of features to explore.


Book of 99 boasts an exceptional RTP of 99%, standing out in the industry as a benchmark for fairness and generous player returns. This high RTP illustrates Relax Gaming’s commitment to player satisfaction, offering an attractive edge to those seeking not just an engaging slot, but a fair contest.


The volatility level of Book of 99 lies on the higher end of the spectrum. This heightened volatility guarantees a thrilling ride, with the prospect of significant swings providing excitement for risk-takers, while also sustaining the potential for noteworthy wins that appeal to various player preferences.

Max Win

Book of 99 presents a staggering max win potential of 5,000x the stake, translating into impressive real-world gains. For instance, a simple €1 bet could lead to a thrilling €5,000 victory, adding a layer of allure for those chasing substantial payouts.


Drawing inspiration from Greek myths, Book of 99's theme resonates with the legendary narratives of Homer's "Odyssey". The slot's captivating motifs and heroic storyline echo the epic tale's essence, inviting players to envision themselves as adventurers in a saga as memorable as this ancient poem.

Exciting Features of Book of 99 Slot Explained

Book of 99 draws players in with its unique and engaging features that significantly uplift the gaming experience. These features not only make every spin more interesting but also bolster the chances for substantial wins, enhancing the allure of the game for seasoned players and newcomers alike.

The spotlight will shine on in-game features that players will encounter during spins. From special symbols that alter the course of the game to thrilling free spins, exclusive bonuses, and the potential for feature retriggers, Book of 99 is teeming with gameplay elements that add depth and dynamics to every round.

Wild Collection Feature

Book of 99 offers a twist with its Wild Collection Feature where the wild symbol serves two purposes; it substitutes for regular symbols to form winning combinations and also fills a collection meter, which can trigger Free Spins when full.

Free Spins

Free Spins in Book of 99 are triggered by either landing three wild/scatter symbols or filling the Wild Collection meter. During this feature, one symbol is chosen at random to become an expanding symbol for bigger win potential.

Expanding Symbols

Though not a traditional bonus round, the Expanding Symbol feature in the Free Spins round of Book of 99 acts similarly, potentially covering whole reels to award massive payouts when triggered by special expanding symbols.

No Gamble Feature

Book of 99 does not include a gamble feature; instead, it keeps the player's focus on the collection and free spins mechanics, ensuring a straightforward yet rewarding slot experience.

Retrigger Feature

The Free Spins feature in Book of 99 can be retriggered, with no upper limit on how many times this can happen, offering players extended gameplay and the chance for additional wins.

Collection Meter

An additional unique feature of Book of 99 is its Collection Meter. Each wild symbol collected in the base game fills this meter, leading to Free Spins once 99 symbols are accumulated, adding a progressive element to the game.

Bonus Buy Feature

Book of 99 does not have a Bonus Buy feature, maintaining its gameplay purity by encouraging players to achieve Free Spins through the Collection Meter or natural gameplay progression.

Navigating Book of 99: Understanding Paytables and Game Info Before You Play

Delving into the paytable and game information of Book of 99 is vital for players aiming to optimize their gaming strategies and elevate their playing enjoyment. Understanding the intricate workings of the paytable, along with the game’s special features, can significantly enhance one's approach to spinning the reels strategically.

Mastering Book of 99’s array of features and mechanics is a potent tool for any player. It's not just about spinning the reels; it’s about spinning them with knowledge and tact, aligning the gameplay experience closely with informed tactics for potentially higher successes and more immersive entertainment.

Decoding the Paytable

Book of 99's paytable reveals the worth of each symbol, from the high-value themed icons to the lower-scoring classics. Understanding the value hierarchy and the role of Wilds and Scatters within paylines is key. The unique aspect of a collection system directly tied to free spins also heightens the importance of every symbol on the reels.

In-Depth Look at Game Features

Book of 99’s features, such as its Wild Collection mechanic, significantly impact the paytable dynamics. Knowing the trigger conditions for Free Spins and how the expanding symbol amplifies winning potential during the bonus round enriches player's strategies, making each decision more informed.

Comprehensive Review: Book of 99 Slot by Bonus Tiime

Book of 99 welcomes players into a realm ensconced in ancient Greek mythology, with a theme that captivates through its rich visual elements and atmospheric color palette. The game’s design transports players into a world of legend, where every spin is steeped in the mystery and allure of the myths of old.

From intricate symbols depicting heroic figures and ancient artifacts to the seamless blend of classic slot aesthetics with a mythological twist, the theme of Book of 99 is an artful fusion of storytelling and casino thrills. The background’s subtle animations paired with a soundtrack that accentuates the theme further immerses players in this epic adventure.

Exploring the Theme

Each symbol in Book of 99 has been meticulously designed to complement the game’s Greek mythology theme. Icons include legendary characters and mythical objects, set against a backdrop of ancient scrolls and temples, with a melodious score that echoes through gameplay, enhancing the overall immersive experience.

Potential Max Win

Book of 99 offers players a chance at a substantial max win potential of 5,000x their bet. Such a win is facilitated through the game's expansive features, notably during the free spins where special expanding symbols can lead to significant payouts, rivaling those of top-tier slots in the industry.

Similar Slots Comparison

Endorphina’s 'Chance Machine 100' conjures a similar classic slot feel with modern twists, aligning with Book of 99’s elegant blend of traditional and thematic elements. In a different vein, 'Demigods IV' by Spinomenal also navigates the Greek mythological waters, bringing its own unique narrative and features to the pantheon of mythical themed slots. Both offerings share thematic resemblances with Book of 99 yet stand out with their approach to storytelling and gameplay mechanics, promising to captivate players who appreciate the timeless tales of gods and heroes.

Book of 99 FAQs: Answers to Your Top Questions About Relax Gaming's Popular Slot

How Do You Play Book of 99?

To play Book of 99, set your bet level using the game's interface, then spin the reels with the aim to land matching symbols on one of the 10 fixed paylines. The unique Wild Collection feature adds an extra layer of engagement, with collected wilds potentially triggering free spins.

What are the Betting Options in Book of 99?

Book of 99 offers a range of betting options to cater to different bankrolls. Players can adjust their wager amount before each spin, making it suitable for both high rollers and those preferring minimal bets. The exact bet range varies depending on the casino's set limits.

Can You Explain Book of 99's Free Spins Feature?

The Free Spins feature in Book of 99 is activated by collecting 99 wild symbols or by landing three or more wild/scatter symbols on the reels. The feature starts with 10 free spins, and a random symbol is selected as an expanding symbol to boost winning opportunities during the round.

Is Book of 99 Compatible With Mobile Devices?

Yes, Book of 99 is designed to be fully compatible with mobile devices. Whether using an Android or iOS platform, the game's responsive design ensures that players have the same quality experience as they would on a desktop computer.

What Other Popular Games Have Been Developed by Relax Gaming?

Relax Gaming has developed several popular online slots known for their innovation and entertainment value. Titles such as 'Money Train 2', 'Temple Tumble', and 'Iron Bank' are heralded for their engaging gameplay and creative features, and have become staples among online slot enthusiasts.

Expert Tips for Playing Book of 99 Slot

Get ready to improve your online slots experience! We offer a range of tutorials and articles for both beginners and seasoned players. These invaluable resources will guide you towards a more strategic and enjoyable gaming session. So, dive in and boost your online slot prowess today!


All Free Slots by Relax Gaming

Quick informations

  • RTP: 99%

  • Provider: Relax Gaming

  • Volatility: Low

  • Max Win: N.A.

  • Popularity: Medium

  • Release date: 01-01-2021

  • Free Spins: Yes

  • Min bet: €0.2

  • Max bet: €1,000.0

  • Autoplay: Yes

  • Gamble feature: No

  • Available on Mobile: Yes

  • Bonus buy: No

Discover all bonuses on Bonus Tiime


Log in on Bonus Tiime

Get started with a Free Account


Forgot password?


Don't have an account?

Create an account

Recover a password

An email will be sent to you with a new password.