Book Of Fusion ™ – Review, Bonuses, Free Spins, Free Play in Demo Mode

Developed by Light and Wonder, The Book of Fusion online slot is a game.

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This game has a grid of 5 by 3 and ten fixed paylines. The creators claim that the slot RTP is 89.99% while the variance is high. It is located in an ancient laboratory packed with gizmos, gauges, and potions. Free spins and wilds are incorporated in it.


To be discussed in the review is Light and Wonder slot, which is a combination of conventional payline mechanics with modern online slots that have themes. In this Book of Fusion slot review, we will try to locate all the advantages it has to offer as well as its drawbacks. Las Vegas was where Light and Wonder, a global gambling capital, started operating from in 2018. As a result of purchases, it is now one of the biggest software suppliers for internet slots and casino games globally.

Book of Fusion is a typical online slot, which does not depart from the norms as it has 10 fixed paylines but this is quite contrary to Irish Riches Megaways that has numerous winning combinations. It has three rows and five reels. The smallest possible bet size is 0.10 while the largest size is 35. There are eleven standard symbols: the Book, the Scientist, the Generator, the Switch, the Meter, the Magnet and five high playing cards.

Book Of Fusion ™ - Free Play in Demo Mode

Dive into the world of Book Of Fusion ™ and enjoy our exclusive Free Play in Demo mode. You can try this exciting slot without spending money to see how it works, explore its paylines, features and bonus rounds at no risk. Find your strategy in Demo mode, comprehend game mechanics and define a winning betting system for your future play. Unlock the excitement without spending a dime as you engage in Free Play, immersing yourself in the entertaining universe of Book Of Fusion ™.Discover the game's unique mechanics, visualize potential winning combinations, and master your gameplay strategy—all in a no-risk environment. Try your luck in Demo mode today and prepare for an exhilarating gaming experience when you're ready to make a splash with real wagers.

Theme, Graphics and Soundtrack

Graphics have been well thought of. An immensely detailed lab background and the equally impressive images on a semitransparent grid are also seen in this game. There is a bass-heavy, somewhat eerie electronic loop playing in the background that includes some lab sounds.

Book Of Fusion
Book Of Fusion

Book of Fusion RTP and Variance

89.99 percent is the Return to Player (RTP) for Book of Fusion, which is a below-average number according to Light and Wonder. Even so, there are some stages where RTP differs from others, thus you might experience 93.98% as well as 95.87%. It has got high volatility.

How to Play Book of Fusion

  1. Winning combinations must occur on adjacent reels, beginning from the furthest left. For the lower-value symbols you need at least three to match, but with the higher-value symbols you can win with just two.
  2. In order to choose your bet level, click on the three-dots. This gives you a slider which you move left for a lower bet and right for a higher one. Alternatively, you may select the options shown in the boxes. 
  3. Wins on different paylines and coinciding wins are added together.
  4. Open the bet settings by clicking on the coins icon. Use the plus and minus buttons to adjust the amount.
  5. Click on the large circular arrow to set the reels spinning.
  6. Click the lightning bolt button to shift into fast play mode.
  7. Click the smaller spin button to enter autoplay settings mode. Here you can choose a number of auto spins from 5 to 100. You can also set the mode to quit if you reach a specified single win limit or loss limit.
  8. We encourage you to play online slots in a responsible manner. We are supporters of safe gaming initiatives and would stress the importance of never betting more than you can afford to lose. Playing an online slot machine in its no deposit slot form is a safe way of learning how a game works before risking money. If you choose to bet, then make sure you stop playing when you are no longer enjoying it and always make use of the self-exclusion features in your gaming account.

Bet Sizes and Paytable Wins

Bet amounts range from 0.10 to 35.

Two or three times multipliers can go as far as five times, highest payouts for each symbol are as follows.

Book, Scientist

5 = 50.00

Generator, Switch

5 = 20.00

Meter, Magnet

5 = 7.50

Ace, King

5 = 1.50
Queen, Jack, 10

5 = 1.00


5 = 20.00

Max-win 6,519x
Volatility High
Top RTP 93.98%

Book of Fusion Bonus Features


In the base game, all symbols are replaced by a substitution. Furthermore, it has a scatter payout and can substitute for any symbol in payline wins. During the bonus round, the growing symbols cannot be substituted by the wild.

Free Spins Bonus

When three or more Wild symbols show up in view, it means that the Free Spins Bonus is triggered. Thereafter, 10 free spins are given out as a reward. At the beginning of the free spins feature, two symbols- featuring special characteristics will be randomly selected and will expand across the reels. If you retrigger the bonus round, you will get two additional special symbols.

For growing icons to form a triumphant combo, they don’t need to be situated beside each other. If all ten symbols are active during the free spins round, it is not possible for the bonus to be retriggered. The wild does not substitute as any of the special symbols in the bonus round.

Book of Fusion Review: Our Verdict

The visual appearance of this product fails to live up to the expectation that is created. We expected a more intricate bonus feature given such an elaborate theme. When we talk about the free spins round, it is worthy of noting that the concept of expanding symbols is fresh. Nevertheless, there is no actual bonus game. On the other hand, the RTP is quite pathetic. But as for me, it can be fun in small quantities.

Disclaimer: The Book Of Fusion trademark / license is owned by Light & Wonder. This site is not endorsed by Light & Wonder.


What is the RTP of Book of Fusion?

Its basic Random Number Generator (RNG) percentage is 89.99 which is ridiculously low for any pay or no deposit game and one of the lowest we’ve encountered in some time. Nonetheless, it varies and can be higher in alternate stages of the game but even at its highest it only reaches 95.87 percent compared to an average 96 percent.

What is the volatility of Book of Fusion?

There is a high level of volatility. Variance, which is the other name of volatility, measures how frequently and extensively payments are made by online slots and no deposit slot wins that are hypothetical. Higher volatility would tend to mean larger but less frequent winning amounts whereas games with low volatility would have smaller but more frequent winnings.

Is there a secret to winning at Book of Fusion?

A random number generator controls the reels. This simply means that there is no specific pattern or logic to which the reels land and no correlation between different spins in various games. You can predict, but that’s all you can do. It is just a game of luck.

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