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Book of 99 Game Details
Software
Relax Gaming
Release date
May 04, 2021
Slot Type
Video Slots5 Reel SlotsBest Payout Slots
RTP
99%
Volatility
Undisclosed
Paylines
10
Reels
5
Min bet
0.1
Max bet
100
Max win per line
50x
Total Max Winnings
Undisclosed
Themes
MysteryScience Fiction
Mobile
Yes
Free Spins
Yes
Bonus round
No
Wild
Yes
Multiplier
Yes
Scatter
No
Progressive
No
Adjustable Paylines
No
Other features
Free SpinsDesktop
+3
Technology
HTML5
Winning on Book of 99 Slot: Paytable & Paylines
Book of 99 is a 5 reels slot with 9 symbols and a multiplier ranging between 0.05x to 50x.
CHOOSE YOUR BET
USD
How to useHow to use the paytable
To use the paytable on a slot machine, follow these steps:
- 1. Select your preferred currency.
- 2. Choose your bet size, which can be any value from 1 to 500.
- 3. Refer to the paytable to see your potential winnings based on the selected bet size.
The paytable shows dynamic values based on the bet amount you enter, so the bet value you choose will be multiplied according to the paytable multipliers for the slot machine.
Some slot machines only accept certain bet values such as $0.01, $0.05, $0.10, etc. These machines may not allow you to bet on a custom value, like $0.07.
When selecting a bet value, be mindful of any limitations that may apply to the specific slot machine you are using.
| Symbol | 2x | 3x | 4x | 5x |
|---|---|---|---|---|
 | $0.1 | $1 | $10 | $50 |
 | $0.05 | $0.4 | $4 | $20 |
 | $0.05 | $0.3 | $1 | $7.5 |
 | $0.05 | $0.3 | $1 | $7.5 |
 | - | $0.05 | $0.4 | $1.5 |
 | - | $0.05 | $0.4 | $1.5 |
 | - | $0.05 | $0.25 | $1 |
 | - | $0.05 | $0.25 | $1 |
 | - | $0.05 | $0.25 | $1 |
Book of 99 Paylines
Book of 99 Slot RTP & Volatility: How to Use Them to Your Advantage
Book of 99 RTP Industry Comparison
How RTP WorksHow Return To Player Rate (RTP) Works
The payout rate of a slot machine is the percentage of your bet that you can expect to receive back as winnings.
To learn more, visit our page on the top-paying slot machines.
With a return to player rate of 99%, Book of 99 is a high RTP game that sets itself apart from the rest. Ranked #188 among the top payout slots with an RTP of 97.5% or higher, this game offers players the chance to earn $99 from a $100 wager in the long run.
Book of 99 Slot Features: A Guide for Players
![Available]()
Available features
WildMultiplierFree SpinsAutoplayNon-ProgressiveExpanding WildsBook of 99 has 6 out of 26 most popular slot features.
![Unavailable]()
Unavailable features
Bonus RoundScatterLive DealerNudgesColossal Reels SlotsCascading ReelsWin Both WaysShifting WildsStacked WildsSticky WildsTransferring WildsRandom WildsWalking WildsSplit SymbolsReel RespinsRotating ReelsRetriggeringSlots HoldGambleAdjustable Paylines
Book of 99 Wild Feature
Book of 99 Free Spins Feature
Book of 99 Expanding Wilds Feature
How to Play Book of 99 Slot: Mastering the Basics
Book of 99 Slot Review
Wilna van Wyk
Content Writer
Over the past 7 years as a senior iGaming content specialist Wilna still learns something new about online entertainment every day. This vast knowledge she pours into creative writing for Chipy.
Book of 99 is the video slot with which Relax Gaming enters history as the first online slot to offer an RTP of 99%. The developer selected a Greek mythology theme for this truly special occasion. One of the Greek warriors is chosen randomly before you head into battle at the ancient empire during the bonus round.
As a reward, the chosen warrior gets the ability to expand and take the entire reel hostage during free spins. The win potential on the reel belonging to the warrior can fling wins worth up to 5,000 times your bet in your direction. While Relax Gaming can’t set your wins in stone, they kind of do promise you 10 free spins during the bonus round.
Book of 99 just goes to show that you can never judge any book by its cover. The video slot starts with an astonishing video before the bonus information screen appears. It soon became famous for its payout after its launch on the 4th of May 2021. It is now part of the Relax library also home to Sails of Fortune, Spirit of the Beast, and Money Cart 2.
How to Play Book of 99
Book of 99 is a video slot by Relax Gaming featuring 10 fixed payline which means all payline are always active during gameplay. The game also features three rows of symbols across five
columns and has an RTP of 99.00%. The paytable indicates all payouts for the winning combination of which only the highest is paid per payline. The winnings which occur on multiple paylines get added together.
The array of options available when it comes to choosing your wager per spin begins at a low cost of 0.10 up to a high of 100.00. Altering your betting choices is available on the main screen below the reels. You can also adjust the sound and enable autoplay, the number of spins you can activate in one go ranges up to a thousand.
In the advanced setting of the autoplay menu, you can set limits on single wins, win limits and loss limits. The speaker allows you to control sound and music effects, the three lines on the left side open multiple options including the game rules and paytable.
Book of 99 Bonus Features
In Book of 99, the red and gold book is the wild and other bonus features include free spins, expanding symbols, and the collection meter. The bonus features are unique and created to fit in with the video slot rewriting the book of high payout percentage by an online slot.
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Red and Gold Book Wild: The wild in Book of 99 is the red and gold book that can stand in for any symbol, apart from the expanding special symbol during the free spin bonus. The wild can appear on all reels and have no payout value.
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Book of 99 Free Spins Bonus: Gathering three or more red and gold book wilds on the reels opens the page on free spins. The number of free spins you get is 10 and before your head into the bonus round a special warrior is chosen at random.
The special symbol can expand across the entire reel and can award payout on each payline even when the symbols are not on adjacent reels running left to right.
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Book of 99 Collection: For every wild book that appears on the reels during the base game, the collection meter increases by one. The free spins you activate during the game corresponds in value to the average bet size when the wilds were collected. The meter is placed on the left side of the reels and allows you to follow your progress.
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Average Bet Size in Free Spins: The average recorded bet size is an average according to multiple minimum bets and is rounded according to stochastic rounding rules. An average that becomes 1.2 times the lowest bet with a probability of 20% that it rounds off to twice the lowest bet and 80% of rounding off to one the minimum bet.
After the recording of 99 wilds takes place and activation of the free spin bonus, the meter resets and includes any wilds remaining.
Book of 99 Mobile Version
Everyone wants to play the video slot featuring the highest payout percentage of all time. Thankfully you can also enjoy it on all your mobile devices via the Book of 99 mobile version. Great animations and sound effects add to your mobile enjoyment regardless of whether you play the free slot or the real money mobile version.
The benefits of playing on mobile are that you can take your slot experience anywhere, it requires no downloading, you can play via your browser and it’s easy to switch between free and real money play.
Book of 99 for Real Money
Relax Gaming causes waves of enthrallment by launching the video slot that offers a massive RTP of 99%. With such a high payout percentage every slot fan wants to try his or her luck in
winning the highest prize. The real money version of the slot is available at all leading online casinos, and we’ve reviewed them, and you can check out our findings on our best online casinos page.
Book of 99 Slot Ratings & Reviews
Our community rated Book of 99 as Very Good with a score of 4.3 out of 5 based on 157 votes.
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- Over 2 years of experience in the gambling industry.
- Researched and uploaded over 2.000 casino games to the website;
- Assessed the accuracy of more than 5.000 casino games;
- Coordinated and documented over 20,000 data updates across casino games, guides, and land-based casino information.
- Oversaw and maintained large-scale project tracking to ensure timely and accurate content delivery.
- Has a Bachelor's Degree in Psychology from Spiru Haret University.
