Book of 99 Slot Demo

Book of 99 is a slot machine designed to take you on an epic journey with characters from Ancient Greece. This slot game is scheduled to be launched on 4 May 2021. It will have a 5×3 panel, and ten paylines initially introduced in the demo version on 15 February 2021.

Book of 99 slot demo and paid games are a craft of Relax Gaming, one of the online casino software providers specializing in modern and more influencing graphic designs.

Book of 99 Features Overview

Theme Adventure
Type Online Video Slots
Software Relax Gaming
Reels 5
Maximum win 5,000x Stake
Paylines 10
Min coins per spin 0.10
Max coins per spin 100.00
Release date 4 May 2021
Special features Collection Meter, Expanding Symbols
RTP 99%
Slot variance HIGH
Mobile Portrait and Landscape Screen Layout

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Features of Book of 99 by Relax Gaming

Book of 99 Slot
Design of the Book of 99 slot game

Ancient Greece has unforgettable and captivating stories and symbols from ancient Greek mythology. From the one-eyed monster called Cyclopes to the gods and goddesses. It vents excitement and unique features that a player will always come back for. The real money and free Book of 99 demos set you an initial bet of 0.10 coins and a retainer of 5,000 coins.

  • Book of 99 Symbol. This symbol fills the progress meter even during the base game. This figure is a primary Wild symbol that players can collect until the meter reaches 99. There can be two book symbols that can give Free Spins even if they are not adjacent to each other while triggering other reels for additional Free Spins. But when three books are landed, they will unite and reveal pages with several bonus symbols and multipliers plus 10 Free Spins.
  • Expanding Symbol. At the start of Free Spins, one symbol is chosen randomly. It can be any Greek alphabet or character symbols. The symbol chosen is positioned at the top of the collection meter to reference an Expanding symbol. When a minimum of three of these symbols land on the reels (in any position), they expand. Yes, this Expanding symbol increases the win for every Free Spin, giving you continuous astonishing gameplay during the bonus game.
  • Collection Meter. The luckiest trend during the gameplay is the collection meter because even at base game and when a Wild landed, it is already working effectively, gradually climbing to 99. This feature offers 10 Free Spins. This facet also gives more chances to let Expanding symbol concludes with an epic win once again.

Play Book of 99 for free on our site to try all these features.

The Maximum Win in Book of 99 Slots

Relax Gaming has a distinct way of creating slot games that overcome high paying lines and the number of wins to extend. Book of 99 free slots, and its paid variant’s maximum win is 5,000x the bet!

It is one of the best slots for a high RTP, which makes it appealing to the players when they play on mobile. Because it is highly volatile, the chances of winning are exceptional and empowering every time Wilds are doing the game.

The RTP (or Return to Player) is 99.00%, keeping you collecting symbols to obtain more Free Spins, Expanding Symbols, and bonus games while filling the meter. It has high volatility, so there is a considerable possibility to trigger a big win. Test your best strategies on the demo version. Taking this to an actual game will indeed create an epic win when you play online.


When it comes to quality, theme, and RTP, the Book of 99 is the most OK pick for a mobile-compatible online casino slot game. Relax Gaming incorporated an HTML5 technology that makes it more user-friendly to gamblers and newbies while using iOS and Android or personal computers. Unlike other video slots that only focus on the theme and paylines alone, but a game like the Book of 99 mobile slot is a game-changer.

Check out the Midas Coins online slot, a newest game with the same theme designed by Quickspin.