Book of 99

(Relax Gaming)
Book of 99 slot free play demo
CGSCORE 91 Great

This is our own slot rating based on how popular the slot is, RTP (Return To Player) and Big Win potential.

Play Book of 99 free demo from Relax Gaming. Try without cost, just for fun. The best way to learn the rules, features and how to play the game. Also read our unique Book of 99 review with rating to get important information about Book of 99 slot.

Released:May 4 2021

Key Features
  • RTP: 99%
  • Max Win: 5000x
  • Reels: 5
  • Paylines/Ways: 10
Game Mechanics: Themes:

Book of 99 Slot Free Play

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Book of 99 Review

Book of 99 slot review

Book of 99 Reviewed May 4 2021 by Casinogamesonnet.com

Book of 99 is a 5-reel, 10-payline slot from Relax Gaming. It’s a Greek mythology slot that, unlike many games in this genre, doesn’t center on gods and goddesses. Instead, it features original creatures and heroes.

The name Book of 99 alludes to two aspects, this is a “Book of” style slot and the RTP is 99%. The 99% RTP makes this game one of the highest-paying slots of all time. If you’re somebody who closely scrutinizes payout percentages, then you’ll love this aspect. You can find out more about Book of 99 slot below.

Gameplay and Atmosphere

This game spreads 5 reels and 10 paylines across a 5x3 grid. Wins form when 3+ matching symbols land in a line, beginning in the first reel.

Book of 99 takes place in a rural Greek setting at nighttime. The background features a sea, coastline, cliffs, dark clouds, and circling ravens.

The reels are framed by a stone temple, which features Grecian columns going up the sides. One side contains a curvy bar that indicates how many wilds you’ve collected (discussed later).

Overall, Book of 99 offers a high-quality atmosphere with a unique setting. This isn’t just another game that takes place on Mt. Olympus or in Hades.

book of 99 slot overview and summary

Book of 99 Max Win, Payouts and Symbols

Royals (A-10) with little gems in the middle serve as the lowest-paying symbols. A cyclops, male hero, female hero, and Lamia (Greek daemon who eats children) are the highest-paying icons.

The male hero pays the most among this group at 500x your stake for five symbols. The maximum payout is 5,000x your stake when taking bonuses into account.

Book of 99 RTP, Volatility and Betting Options

You can wager between €0.10 and €100 per spin. The €100 max bet creates the possibility for up to a €500,000 jackpot (100 x 5,000).

Book of 99’s RTP is 99.0%. Again, this payout percentage is outstanding and makes Book of 99 one of the highest-paying slots ever.

Volatility lies in the medium-to-high range. A couple of features that we’ll cover next push the volatility higher.

Book of 99 Features

This game offers free spins along with expanding symbols—like so many other Book of games. However, it also injects some originality via a collection system for wilds.

Free Spins & Expanding Symbols

You’ll trigger 10 free spins when landing 3+ wild symbols anywhere on the reels. Strangely enough, you won’t receive a payout on the triggering spin.

One of the symbols will be randomly chosen to act as an expanding symbol (1x3). The special icon will expand to cover its respective reel.

Expanding symbols don’t need to be in adjacent reels to deliver wins. For example, you could win by getting the expanded icon in reels 1, 2, and 5.

book of 99 feature

The maximum payout varies based on the symbol involved. You’ll be eligible for the following max prizes based on the specific expanding icon:

Wild Collection

The collection system provides another way to unlock free spins. Every wild symbol that lands goes into the aforementioned collection bar on the grid’s left-hand side.

The goal is to fill the meter with 99 wilds. Doing so will trigger 10 free spins with the randomly selected expanding symbol.

Similar Slots to Book of 99

This game takes a safe approach to the Book of genre. It features the same format (5 reels, 10 lines) and bonus round (free spins, expanding symbol) as Book of Ra, Book of Dead, Book of Merlin, and many others.

If you’ve played any of these slots before, then you won’t see much new with Book of 99. This game does, however, offer a couple of twists.

The collection system—although done before—is a deviation from these types of slots. The 99% payback is no doubt the defining element that truly sets Book of 99 apart.

Final Thoughts

The mobile gaming world offers no shortage of Book of copycats. Most of these games are just clones with a different theme.

Book of 99 avoids the clone category, though, thanks to a few unique aspects. It offers high-quality graphics, original characters, and one of the best payout percentages ever.

Of course, free spins with expanding symbols have been done a thousand times before. Nevertheless, they still provide chances to win big while you’re enjoying the 99% RTP and graphics.

In summary, Book of 99 presents a compelling case to be worth playing for multiple sessions. At the very least, you might use this game just to meet playthrough on a deposit bonus.

Release Date

Book of 99 was released on May 4 2021.

CGSCORE 91 Great

This is our own slot rating based on how popular the slot is, RTP (Return To Player) and Big Win potential.

Frequently Asked Questions

How to play Book of 99 with real money?

- To play Book of 99 with real money, follow these simple steps:

  • Find a trustworthy online casino that offers Book of 99, preferably one of our recommended casinos in this review.
  • After selecting a casino, make sure to sign up and deposit money in order to start playing with real cash, remember to take advantage of the welcome bonus.
  • Check out the casino's slot section to find Book of 99 game.
  • Click on the game and choose the amount you want to bet.
  • All you have to do now is click on the "spin button" and cross your fingers for a big win. Don't forget to play responsibly and set a budget for your gaming.

Can I play Book of 99 with free spins?

- Yes! You can try our Book of 99 free play demo for fun, without risk of losing any money, right here on Casinogamesonnet.com. You can also play fake money demos with free spins at most of our recommended casinos that have slots from Relax Gaming.

Can I have a Book of 99 bonus?

- Yes! Most of our recommended online casinos offers a first deposit bonus that you can use on Book of 99.

Can I win big on Book of 99?

- You can win average amounts of up to 5000x your stake on this game.

Example: If you bet 1 EUR you can win 5000 EUR at most (when playing with real money).

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