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Book of Ruby Slot - Review, Free & Demo Play

Book of Ruby
Book of Ruby
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Updated: 22.07.2025
Reviewed by: Fabio Duarte
Would you like to experience the excitement of catching gems? Then the Book of Ruby slot machine is what you need! Released on 19/09/2022 by Retro Gaming, it will definitely amaze you. In addition to the high-quality game graphics, players can also count on free spins with expanding symbols Scatter and Wild, which, in turn, can lead to large winnings of up to 1,000x. Therefore, watch our review of this slot machine until the very end to learn about all the features, RTP, and volatility. We will also tell you about the casino where you can play Book of Ruby for real money.
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18+ | New players only | Terms Apply | Please play responsibly | gamblingtherapy.org

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In this review
  1. Slot details
  2. Theme
  3. Bonus Rounds & Free Spins
  4. Summary
  5. Where to play
General information about Book of Ruby slot

General information about Book of Ruby slot

Rating by Fabio Duarte:
7
User’s Rating: (based on  reviews):
8.0
Retro Gaming
Write a review +25 SJ points
  • Release Date:
    19.09.2022
  • Volatility:
    Medium
  • RTP:
    91.7%
  • Multiplier:
    Yes
  • Max. win:
    1,000x
  • Bonus game:
    No
  • Free spins:
    Yes
  • Scatter Symbol:
    Yes
  • Wild symbol:
    Yes
  • Symbol Stacked:
    No
  • Jackpot Game:
    No
  • Slot lines:
    10
  • Slot reels:
    5
  • Layout:
    5-4
  • Stakes range (€/£/$):
    0.10 to 100
  • Slot Theme:
    Gems
  • Technology:
    JS, HTML5
More infoLess info

Licensed and tested by

  • eCogra
  • Gambling Comission
  • MGA

How to Play

Book of Ruby is a fairly simple slot machine that uses a convenient modern interface. The game provides a simple set of actions that players need to do to start the game.

  1. The first action after opening the slot is to choose a bet on the game, which can be selected in the “Total Bet” section
  2. By clicking on the red spin button, you will start the game and start the reels
  3. If you want to automate the rotation, then use the autoplay button
  4. The precious reels will spin and stop randomly to match different combinations
  5. Any winnings you receive will be added to your balance, and you will be able to start playing again

Book of Ruby has a classic layout with 5 reels in 4 rows and 10 paylines. The minimum bet is €0.10, and the maximum is €100, so here each player will be able to decide their own bet option.

Other slots with the same layout that we recommend:

Book of Ruby RTP and Volatility

6 
In addition to high-quality game graphics, the slot machine will offer users an RTP coefficient of 91.65%, with fairly medium volatility.
In this slot machine, the RTP of 91.65% indicates that, on average, players can expect to receive back 91.65% of their total wagers. This is far from the typical range for online slots and may not always provide a fair chance at winning for players. The medium volatility means that players can expect a mix of small and large payouts during their gameplay sessions.

Theme

8 

The gameplay is pretty smooth with beautiful graphics that includes gems on the game reel. The sounds are quiet and not annoying, and the colors are mostly bright red, which complements the overall theme of the game well.

There is a Wild symbol in this slot machine, which is also a Scatter. These symbols are special and can activate 10 free spins, as well as give multipliers from 2x, 25x, and 250x bet per line.

Next are 4 average-paying symbols in the form of gems that will bring players from 0.5x to 100x the bet per line.

The lowest paid symbols A, K, Q, and J, have payouts from 0.5x to 15x the bet per line.

Theme
Book of Ruby slot paytable

Mobile Compatibility

Book of Ruby slot mobile
The Book of Ruby slot machine on mobile devices allows players to spin the reels and match symbols in the same way as on a traditional casino slot machine. The game is fully compatible with mobile devices, as Retro Gaming developers have implemented HTML5 and JS technology to ensure smooth and enjoyable gameplay on the go. Players can easily access the game through their mobile browser without having to download any additional software or applications. Overall, the Book of Ruby slot machine provides an exciting and immersive mobile gaming experience for players who are looking for exciting casino action on their portable devices.

About Retro Gaming

Retro Gaming is a company that specializes in the development of classic slot machines. They use Spinomenal technology to make their games faster, easier, and more interesting for players of all ages with simple interfaces designed specifically for mobile formats! The company pays attention to the combination of designs familiar to the audience of players and modern technologies that provide not only seamless and fast gameplay but also marketing tools: tournaments, sweepstakes, discounts, and other functions, such as Flash Win, Mega Flash Win, and SpinOWheel.

Bonus Rounds & Free Spins

8 

Free Spins

If a player collects 3 or more Scatter-Wild symbols, they activate the free spins feature. As soon as the free spins begin, the player will be presented with a book with a start button, which he will press to determine which symbol will be the expanding symbol in the free spins round.

In addition, if the free spins were launched with a retro bet, then these spins will be activated with a multiplier that can multiply your winnings by 1x–5x. Free spins can be triggered again and bring additional 10 free spins.

Free Spins – Expanding Symbol

In the free spins round, after determining the result of the slot machine, the expanding symbol will expand, forming new paylines in addition to the existing paylines. The expanding symbol will be paid according to the paytable on all active paylines, regardless of whether the symbols of the winning combination are consecutive or not. The player must also understand that the extended symbols are counted separately from the initial result of the slot machine.
Book of Ruby slot Free Spins – Expanding Symbol

Retro Bet

Players have the option to activate the retro betting feature to unlock the multiplier feature, which can multiply your winnings 1x–5x. The retro bet feature costs an amount equal to your total bet. The function can be disabled at any time in the game.

Book of Ruby Demo Play

The Book of Ruby Demo Play offers a unique opportunity for players to test out the free version of this popular slot game. With demo mode, players can experiment with different strategies and get a feel for the gameplay without having to put any money on the line. Plus, it's a great way for new players to introduce themselves to the exciting world of online slots.

Max Win

6 
One of the most exciting features of the Book of Ruby slot machine is the ability to break the maximum win of 1,000x.
One of the ways to potentially break the maximum win of 1,000x in the Book of Ruby slot machine is to launch a bonus round of free spins, which can also bring good multipliers if it was launched with a retro bet. In addition, special symbols such as expanding or scattered wild symbols can also increase winnings and potentially exceed the maximum limit. Using these features, players can increase their chances of maximum winnings in the Book of Ruby slot machine.

Overall Rating

7
The Book of Ruby slot machine from Retro Gaming is definitely worth watching for any fan of the genre. The graphics and soundtrack perfectly convey a rich atmosphere, as well as provide modern features such as free spins and a retro bet feature. However, what really sets this game apart is the innovative use of technology as a game mechanism. Players can easily collect gems on the game reel and get amazing winnings. Overall, this exciting combination of high-quality design and modern features makes Book of Ruby a must for any fan of gaming nostalgia.
Hits
The presence of a Scatter-Wild symbol
Free spins
High-quality graphics of the game
Retro bet function
Misses
There is no jackpot in the slot machine

Book of Ruby Slot - FAQ

What is the Return to Player (RTP) rate of Book of Ruby?

In this slot, the RTP coefficient is 91.65%, which is a pretty low return potential.

Do I need to make a deposit to play this game?

No! To begin with, you can start the game with the free demo version, which is presented in this slot. This way you will understand the game and be able to test different combinations.

Can I play Book of Ruby on other devices?

Yes! Thanks to the use of HTML5 and JS technology in the slot, players can enjoy the game on different types of devices.

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Fabio Duarte
Fabio Duarte
Expert in: News, Blog, Slot reviews, Payments
Fabio is a young writer with +6 years of experience in gambling & betting. Fabio creates professional reviews of casino and slots. Every single article Fabio made exhibits deep analytical skill and comprehensive coverage of a topic. It’s Fabio – one of the leading authors on slotsjudge.com.

2162 articles

Reviewed by Editor-in-Chief
Nikita Lukanenoks

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Overall rating

Based on 1 reviews

8/10
Sloto Toto own avatar
Sloto Toto
6 lvl Superstar
8
Winning: €3
Multiplier: x4
I like “Book of” mechanics and I like gems genre. So it’s not surprising that I couldn’t pass this one.
U know what to expect from the slot when it comes to gameplay. There is one pretty unique feature in the game called Retro Bet. It’s basically a 100% ante bet that can bring additional multiplier when active.
The slot is up & down and go on a signature Spinomenal down streak. Have ur eyes on the bankroll all the time and don’t go for a broke if the game doesn’t pay.
Review image 2110-0
09.12.2022
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