Book of 99 Slot Review

Enjoy new adventures in ancient Greece! Slot machine Book of 99 has the highest rate of return. Special characters on the playing field, bonuses and free spins are waiting for you in the slot.

Book of 99 slot from the company Relax Gaming continues such a popular nowadays “book” series. The online game was released on May 4, 2021, and in that time, it has already won gambling audience popularity. This time, players are invited to go to ancient Greece and meet the gods and monsters. According to the tradition of projects of this developer, the adventure can bring fun to play and a pretty good reward. A distinctive feature of the slot is the fact that the emulator RTP is a record 99%. In addition, the virtual machine has implemented amusing game mechanics to help players succeed and get the coveted big winnings.

How to Play the Book of 99?

So that the game for real money has not led to disappointment and loss of money, experienced gamblers advise starting the ancient Greek adventure with a run of free Book of 99. In this mode, you can quietly analyze all aspects, rules and features of the slot. And already on this basis to conclude – will the Book of 99 online be attractive for a particular player.

To begin immersion in the atmosphere of Ancient Greece, you do not have to make significant efforts. It is enough to just:

  1. Find a suitable online casino in which the game will be comfortable and safe.
  2. Register if you want to bet real money. The demo Book of 99 slot will work fine without registration.
  3. Run the emulator by clicking on its icon and wait for the entire load.
  4. Configure the game parameters as you wish – the sounds, music, the reels speed and the start of the spin with the keyboard.
  5. Set a suitable size for a bet. In this sense, the game provides greater freedom – you can put from $ 0.1 to $ 100.
  6. Begin the adventure by launching the first spin.

Fields and Symbols in the Book of 99

All the events that will face the gambler in a slot machine Book of 99 unfold on a standard playing field. Its size – five reels with three cells each.

Game characters in the online slots Book of 99 are fully consistent with the theme of the game. Therefore, such a set represents them:

  • five traditional card symbols – from the Ten to the Ace, combinations of card symbols are paid not too high;
  • four expensive ones – Lamia, Cyclops, Goddess and Hero;
  • a special symbol here is one – the Book, it is both the Wild and the Scatter.

How to Win a Slot Book of 99?

To make a profit, you need to collect a combination of three (if it’s low-paying) or two (if it’s expensive) of the same characters. Only combinations going from left to right are taken into account. The paylines in the slot game are always ten, which can be considered not very big for modern slot machines with a 5 X 3 field.

The online game Book of 99 has some peculiarities, due to which players can significantly increase their winnings and even count on the maximum prize, which is here x12,075 winnings.

Interesting Features of the Book of 99 Slot

Every gambler needs to be able to spin the reels and collect nominal profits from combinations, and also from time to time to diversify their gaming sessions through a variety of mechanics built into the slot algorithm by the developers. In simple terms, the more versatile the slot, the more interesting it is to play. Relax Gaming studio understands this very well, so they have equipped their project with an exciting prize game with free spins. You can run this option in two ways.

For the first way, you need to have at least three books landed on the reels at the same time. The player will instantly get ten free spins of Book of 99, during which such rules apply:

  1. A random character is selected before the start of the prize rounds.
  2. During the free spins, it will expand, occupying all the cells of the reel. In addition, this symbol will always be paid, even if it does not make up a line.
  3. Three Books reappearing on the field during free spins will bring ten more free spins.

You can get ten free spins with the same rules in another way. To do this, you need to fill the progress bar of 99 steps. Each Book that appears on the field allows you to make one step.

Book of 99 on Mobile

Some gamblers find it more convenient to play on cell phones and tablets. The mobile Book of 99 was released especially for them and is adapted to the browsers of modern devices. The version of Book of 99 for mobile works perfectly under any technical parameters of the gadget, it does not require loading and provides the exact same gameplay as the desktop variant.

Dispersion and Return Rate in Book of 99

Book of 99 online slot has an unprecedentedly high RTP=99%. In addition, high volatility makes the machine ideal for long gaming sessions, such as winning back the wager.

Book of 99 Review Summary

Book of 99 is an excellent modern virtual slot machine. The mathematical model makes the emulator significantly in demand to meet the wagering requirements. In addition, the gameplay itself is fascinating, and the game brings pleasure.

Advantages and Disadvantages of the Slot Game


  • extremely high RTP;
  • bonus game;
  • accumulation of progress to run the prize mode.

The only apparent disadvantage is that you have to spend a lot of time to realize all 99% returns.

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