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Last Updated: 9th July 2024

Book of 99 Slot Review (Relax Gaming) Slot Review: RTP & Free Spins

The online slot machine games market is brimming with options, but the Book of 99 slot by Relax Gaming manages to make a mark with its distinctive features. Set against the backdrop of Ancient Greece, players get to engage in epic battles with gods, bringing an element of mythology and adventure to the gaming experience.

But what truly sets this game apart is its remarkable 99% RTP. This high Return to Player percentage isn’t just a number; it signifies the game’s commitment to offering players a fair and rewarding experience. 

With such a generous RTP, players have a better shot at reaping rewards, making the Book of 99 slot a compelling choice for both novice and seasoned players.

Relax Gaming, the developer behind this game, has a reputation for delivering quality and innovation. Their approach to the Book of 99 slot is no different. While the game borrows from the popular ‘book of’ style, it introduces elements like a wild collection system, which is a rarity in such games. 

This system not only adds a layer of excitement but also rewards persistent players. The game’s visuals, with cartoonishly designed symbols representing heroes and villains from Greek mythology, further enhance the gaming experience. 

The accompanying music, with its rhythmic beats, complements the theme, transporting players to a world of myths and legends.

In a market flooded with similar offerings, the Book of 99 slot manages to choose the best online casino experience for its players. Its unique features, combined with the trustworthiness of Relax Gaming, make it a game worth exploring.

Book of 99 Slot Overview


Relax Gaming


99% RTP

Max Win:




Dynamic Features of Book of 99 Slot

The Book of 99 slot doesn’t hold back when it comes to free spins. Players can activate this feature in two unique ways. Whether you land at least three Wild Symbols in one spin or fill up the Collection Meter, you’re in for a treat with 10 free spins.

Expanding Symbols: A Game Changer

During these free spins, keep an eye out for the Expanding Symbol feature. A standard symbol randomly transforms and expands, potentially filling up the entire reel. This not only increases the chances of a win but can also lead to significant payouts. 

Depending on the symbol’s position on the reel, it can pay out on all 10 paylines. The potential wins range from 100x to a whopping 5000x!

The Collection Metre: More than Just a Counter

Another intriguing aspect of the Book of 99 slot is the Collection Meter. Every time a Wild Symbol appears, it contributes to this metre. 

Once you collect 99 Wilds, the Free Spins feature activates, offering the same expanding symbol feature. After the spins, the metre resets, and the collection begins anew.

Why Book of 99 Stands Out in Relax Gaming's Portfolio

Relax Gaming boasts a wide range of games, but Book of 99 shines brightly among them. With a remarkable 99% RTP, it’s no wonder players gravitate towards this slot. 

This high Return to Player percentage is a testament to the game’s potential and Relax Gaming’s commitment to player satisfaction.

For those interested in exploring more, there are numerous slot games online Malaysia that promise an equally thrilling experience. offers a plethora of options. While Book of 99 is a star, many other slot games promise exhilarating gameplay and rewards.

Streamlined Financial Transactions in Book of 99 Gaming

Engaging with the Book of 99 at online casinos introduces players to an extensive array of deposit and withdrawal mechanisms. 

Traditional banking avenues stand side by side with modern-day solutions, such as crypto online casinos, offering a broad spectrum of choices tailored to individual needs.

To elevate your gaming sessions, it’s paramount to align with an online casino that mirrors your financial inclinations. By doing so, you not only ensure seamless monetary transactions but also foster a sense of security, allowing you to delve into the game with undivided attention.

The Book of 99, backed by its robust platform, prioritises both the speed of transactions and the safety of players’ funds. By partnering with reputed financial platforms, the game ensures that players can both deposit and withdraw their winnings with confidence and efficiency.

With the rise of digital currencies, the Book of 99 stays ahead of the curve by integrating crypto solutions. This not only caters to tech-savvy players but also paves the way for a future where digital coins might become the norm in online gaming.

Whether you prefer traditional banking methods or modern solutions like e-wallet casino Malaysia free credit no deposit, there’s something for everyone.

Seamless Transition to Mobile Play

Book of 99 slot game isn’t just another online slot; it’s a mobile gaming marvel. Designed with the modern player in mind, it offers a flawless transition from desktop to mobile. So, whether you’re waiting for a friend at a café or taking a break from work, the game is right at your fingertips.

Feedback from the gaming community is clear: the Book of 99 shines brightest on mobile. Players from around the world praise its responsive design, crisp graphics, and uninterrupted gameplay on mobile devices. It’s not just about playing a game; it’s about experiencing it in its best form.

What sets the Book of 99 apart is its consistent performance. While some games might offer a stellar desktop experience but falter on mobile, this slot delivers a top-notch experience across the board. It’s this commitment to quality that ensures players remain engaged, no matter where they play.

Responsible Gaming: Prioritising Player Safety with Book of 99

Responsible gaming ensures that players enjoy their gaming experience without falling into problematic habits. It’s not just about playing for fun; it’s about understanding the risks and setting limits.

The Book of 99 slot, developed by Relax Gaming, goes beyond offering an engaging gaming experience. It actively incorporates features that promote responsible gaming. These features are designed to help players recognize their gaming habits and take necessary precautions.

Many online slot machine games provide tools that allow players to set limits on their playtime or spending. The Book of 99 slot is no exception. With built-in features, players can set their own boundaries, ensuring they don’t exceed their personal limits.

When you opt to play the Book of 99 slot, you’re not just choosing a game with high entertainment value. You’re choosing a game that prioritises your safety. With its responsible gaming features, players can enjoy the thrill of the game while staying in control.

BP9 as an Alternative Option to Book of 99

BP9 stands out as a notable choice for gaming enthusiasts seeking variety. Offering an array of games, BP9 ensures that players have a plethora of options to delve into. While many are drawn to the distinct features of the Book of 99, BP9 ensures a multifaceted gaming journey that’s worth considering.

While the Book of 99 offers an immersive experience with its high RTP and engaging features, it’s essential to remember that the gaming world is vast. Platforms like BP9 present a diverse range of games, ensuring that players have multiple avenues to explore. 

Whether you’re a fan of mythological adventures or seeking something different, the gaming realm has something for everyone.


Developed by the renowned Relax Gaming, the “Book of 99” slot game offers a refreshing twist in the online casino Singapore landscape. With a staggering 99% Return to Player (RTP) percentage, it’s no wonder this game has garnered attention. 

Set against the rich tapestry of Ancient Greek mythology, players are treated to a 5-reel, 10-payline game that’s both visually appealing and rewarding.

The game’s design draws inspiration from Greek legends, with symbols that depict heroes, monsters, and tales from various myths. The graphics, combined with a captivating soundtrack, create an immersive experience that transports players to a bygone era.

But it’s not just the aesthetics that make the “Book of 99” slot game shine. 

The potential for big wins is significant. During the Free Spins feature, players can win up to 5000x their stake, thanks to the Expanding Symbol feature. This feature ensures that selected symbols expand to cover the entire reel, increasing the chances of landing a winning combination.

The game also introduces an innovative way to trigger Free Spins. While players can activate this feature the traditional way by landing three or more Wild Symbols, there’s an added twist. 

The Collection feature allows players to fill a metre by landing Wild Symbols. Once they collect 99 Wilds, the Free Spins feature kicks in, adding another layer of excitement to the gameplay.

Frequently Asked Questions

Its impressive 99% RTP, combined with the potential for substantial wins, makes it a favourite among players. 

Relax Gaming, a name synonymous with innovation and quality in the gaming industry, developed this game. 

Absolutely. Players can enjoy a seamless gaming experience on both desktop and mobile devices. 

The game beautifully integrates elements of Ancient Greek mythology, bringing to life various characters and stories from the myths. 

Players have two options: either by landing three or more Wild Symbols or by collecting 99 Wilds through the unique Collection feature.

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