Book of 99
Developed by Relax Gaming – Experience the legendary 99% RTP Greek odyssey with innovative Wild collection mechanic
Developed by Relax Gaming – Experience the legendary 99% RTP Greek odyssey with innovative Wild collection mechanic
Book of 99 shatters industry standards with a 99.00% RTP – one of the highest ever offered in a video slot. Your wagers stay in play longer, extending your Greek adventure through ancient temples and mythical encounters.
Every golden Book symbol that lands on the reels advances your odyssey. Collect 99 Wild symbols across your spins to trigger a special Free Spins round – or land three Books in a single spin for instant access to 10 Free Spins with expanding symbols.
Land golden Book symbols on any position during base game spins
Each Book adds to your meter count – progress saved across sessions
Reach 99 Books or land 3+ Books simultaneously to trigger 10 Free Spins
All values are multipliers of your bet. The Wild Book symbol substitutes for all regular symbols and also triggers Free Spins when 3 or more land simultaneously on the 5x3 grid across 10 fixed paylines running left to right.
Trigger 10 Free Spins by landing 3 or more golden Book symbols anywhere on the grid. Before the feature begins, one of the nine regular symbols is randomly selected as the special expanding symbol.
High-paying character symbols expand with just 2 on screen, while card symbols require 3. Expanded symbols pay on all 10 paylines regardless of position – no left-to-right requirement.
Retrigger with 3+ Books for +10 spinsTwo distinct paths lead to the Free Spins bonus. The instant route activates when you land 3 or more Book Wilds in a single spin. The collection route rewards persistence – gather 99 Book symbols across any number of spins.
Your collection meter progress is saved between sessions. When you complete the 99-Book journey, Free Spins play at the weighted average bet size used during collection.
Progress saved across sessionsUse the minus and plus buttons to adjust your stake. Available bets range from the minimum to 100.00 per spin. Your bet locks once you initiate the spin.
Click the large circular Spin button to set the 5x3 grid in motion. Use the turbo button to enable quick spin mode for faster gameplay, or activate autoplay to run multiple consecutive spins automatically.
Match three or more identical symbols from left to right on any of the 10 paylines. The golden Book acts as a Wild, substituting for all regular symbols to complete wins.
Watch the vertical collection meter on the left edge of the screen. Each Book Wild that lands increments your count toward 99. Reach the goal to unlock Free Spins at your average bet.
Land 3 or more Book symbols in one spin, or complete your 99-Book collection. A random symbol is chosen to expand during the 10 Free Spins, paying on all lines when enough land on the reels.
Book of 99 features a 99.00% return to player rate, meaning the game is designed to return $99.00 for every $100.00 wagered over the long term. Relax Gaming built this slot with a focus on extended play value and player-friendly mathematics. This RTP is significantly higher than the industry average of 94-96%.
A vertical meter on the left side of the screen tracks every golden Book Wild symbol that lands during base game spins. Each Book adds one count toward a goal of 99. When you reach 99 collected Wilds, 10 Free Spins automatically trigger. Your collection progress is saved even when you close the game, so you can continue your journey across multiple sessions. The Free Spins play at the weighted average of the bet sizes you used while collecting the 99 Wilds.
Yes. Landing 3 or more Book Wild symbols anywhere on the 5x3 grid in a single spin instantly triggers 10 Free Spins. This immediate trigger method plays the bonus at your current bet size. If you simultaneously land 3+ Wilds and complete the 99-Wild collection in the same spin, both Free Spins sets are awarded – the instant trigger plays first, followed by the collection trigger.
When Free Spins begin, one of the nine regular symbols (Male Hero, Prophetess, Cyclops, Sorceress, or card symbols A/K/Q/J/10) is randomly selected as the special expanding symbol. During each Free Spin, normal payline wins are paid first. Then, if enough special symbols land (2 for high-paying character symbols, 3 for low-paying card symbols), they expand to fill entire reels and pay on all 10 paylines based on the number of symbols present, regardless of their horizontal position on the grid. Wild symbols are disregarded for the expanding symbol payout calculation.
The Male Hero character is the premium symbol in Book of 99. Landing five Male Hero symbols on a payline awards 1000x your bet, four awards 200x, three awards 20x, and two awards 2x. The Prophetess is the second-highest paying symbol at 400x for five of a kind. The golden Book symbol acts as a Wild substitute but does not have its own paytable value.
Yes. If 3 or more Book Wild symbols land anywhere on the reels during a Free Spin, you are awarded an additional 10 Free Spins. Retriggers can occur multiple times within a single bonus round, extending your Free Spins session and accumulating wins with the expanding symbol mechanic still active.