⚠ Gambling can be addictive. Play responsibly. Set limits. Responsible gambling
Play on Stake →

Book of 99

Updated:

⚡ Quick answer

Book of 99 by Relax Gaming is a slot with a 99% RTP, high volatility and a max win of 12,075×. On return-to-player this is an excellent figure. It plays with crypto on Stake; RTP is a long-term average, not a guarantee.

99%RTPHighVolatility12,075×Max winRelax GamingProvider
Book of 99 is a high-volatility video slot by Relax Gaming with 99% RTP and up to 12,075× max win. Key features: Wilds, Expanding Symbols, Scatter, Free Spins.
ProviderRelax Gaming
RTP99.00%
Volatilityhigh
Max win (×)12075
Reels5-3
Paylines10
Released04.05.2021

Book of 99 — analytics

Live from our slot database
Slot RTP
99% Excellent
90%96% base99%
This slot99%
Provider avg96.14%
Database avg95.26%
96% baseline96%
Win potential
12,075×
10×1000×100k×
Volatility
High
lowmedhigh

About Book of 99

Book of 99 by Relax Gaming is a slot playable with cryptocurrency on Stake. Its stated RTP is 99% — above the 96% industry average, which is favourable for players over the long run. Remember that RTP is a statistical average over thousands of spins, not a guarantee for any single session.

On volatility, Book of 99 falls into the "high" category: wins land less often but can be large — this style needs a bankroll cushion and patience through dry spells. Volatility is independent of RTP and shapes how the game actually feels.

The maximum potential is 12,075× your stake. This is the payout ceiling, reached very rarely and usually only via the top bonus feature; treat it as a limit, not an expectation.

The slot's key mechanics include wilds, expanding symbols, scatter, free spins. Most of the potential is delivered through these in the bonus rounds.

Before playing for real money, try Book of 99 in demo mode to learn the bonus frequency and behaviour risk-free — the demo math is identical to real play. Gamble responsibly, within a pre-set budget. 18+.

wildsexpanding-symbolsscatterfree-spins
Book of 99
HIGH RTP
99%
VolatilityHigh
Max win12,075×
Reels5-3
ProviderRelax Gaming
Free spinsYes
Bonus buyNo
Data-driven from provider specs · RTP is a long-term average
Rate Book of 99—

How to play Book of 99

Because Book of 99 is high volatility, wins are infrequent but can be large. Use smaller bets relative to your bankroll so you can ride out longer dry spells, and set a loss limit before you start. Chasing losses with bigger bets is the fastest way to bust against a fixed house edge. No betting system overcomes the house edge — play Book of 99 for entertainment within a budget.

More from Relax Gaming

Moody Fruits99.91% RTPMagical Dice99.88% RTPBlackjack99.6% RTPJacks or Better98.88% RTPPoker Dice98.87% RTPPile Poker98.74% RTP

Compare Book of 99 with…

Head-to-head on RTP, win and features
vs Moody Fruitsvs Magical Dicevs Blackjackvs Jacks or Bettervs Poker Dicevs Pile Poker

Similar high-volatility slots

Cards of Asgard All AcesSwitch Studios · 99.92% RTPCaribbean Beach PokerWazdan · 99.9% RTPMagical DiceRelax Gaming · 99.88% RTPBlackJackEsa Gaming · 99.61% RTPCards of Ra Jacks or BetterSwitch Studios · 99.54% RTPNeon Blackjack ClassicFugaso · 99.54% RTP

More Gods slots

Ed Jones and Book of Bastet XtremeSpinmatic · 99% RTPGates of HeavenPragmatic Play · 98% RTPRelic RichesAmatic Industries · 97.85% RTPOlympus HDPlay Labs · 97.69% RTPOlympus ReelsWorld Match · 97.69% RTPTemple of HeroesKalamba Games · 97.62% RTP
Compare Book of 99 side by side with another slot in our slot comparison tool →

Explore related slots

Collections and head-to-head comparisons
Relax Gaming Ancient slotsRelax Gaming High volatility slotsGods High volatility slotsWilds Gods slotsWilds Ancient slotsWilds Book slotsExpanding Symbols Gods slotsRelax Gaming Wilds slots

Everything about Book of 99

Detailed pages for this slot
RTPMax winVolatilityDemoReviewStrategyPayoutBonus buyFree spinsFeaturesThemeBet limitsReelsReleaseWorth it?How to playMobileReal moneyBonusAlternativesSymbolsJackpotMultipliersAutoplayBig winProvably fairGameplayNo downloadMegawaysHit rateScatterWild

Related resources

Guides, tools and sections to go deeper
RTP explained simplyguideSlot volatility: high vs lowguideHow online slots actually workguideHow to choose your first slotguideHow to read a slot paytableguideSlot RTP comparisontoolEV calculatortoolVIP calculatortoolBankroll simulatortoolAll slotssectionBest by RTPsection
★ Promo-code bonus
Start playing on Stake
Crypto, provably-fair games and instant withdrawals
Promo codeAIGAME
  • Provably-fair games
  • Instant crypto withdrawals
  • 35,000+ games
  • 24/7 support
Play on Stake →
18+ · Play responsibly. Geo-restrictions apply.

Comments

No comments yet. Be the first to share your experience.

Your rating

FAQ — Book of 99

What is the RTP of Book of 99?
Book of 99 has an RTP of 99%. This is above the industry average. RTP is a long-term theoretical return, not a guarantee for any session.
What volatility is Book of 99?
Book of 99 is a high-volatility slot. Rare but larger wins — needs a bigger bankroll.
What is the max win on Book of 99?
The maximum win on Book of 99 is 12,075× your stake. It is reached very rarely, usually via the top bonus feature.
Is Book of 99 provably fair?
Book of 99 is a third-party slot by Relax Gaming using a certified, audited RNG rather than Stake's provably-fair system (which applies to Originals). Results are random and unpredictable.
Can I play Book of 99 for free?
Yes, Book of 99 is available in demo mode to learn the mechanics risk-free. The demo math is identical to real play, but results do not carry over.
Who makes Book of 99?
Book of 99 is developed by Relax Gaming, whose games are available on Stake. Find more Relax Gaming titles in the providers section.
How do I play Book of 99 on Stake?
Sign up, deposit cryptocurrency (BTC, ETH, USDT and more), find Book of 99 in the slots catalogue and launch it. Set a session limit in advance.
What features does Book of 99 have?
Book of 99 includes wilds, expanding symbols, scatter, free spins. These mechanics drive how bonuses trigger and wins build.
Does Book of 99 have free spins?
Yes, Book of 99 has a free spins round, usually triggered by scatters, with wins boosted by multipliers.
What is the theme of Book of 99?
Book of 99 is themed around gods, ancient, book. The theme is cosmetic and does not affect RTP or odds.
How many reels does Book of 99 have?
Book of 99 uses a 5-3-reel layout with 10 paylines or ways to win.
Is Book of 99 worth playing?
It comes down to your taste for its volatility and theme. RTP and features are the objective facts; the rest is preference. No slot is profitable long-term — play for entertainment within a budget.
Can I play Book of 99 with crypto?
Yes, Book of 99 is played with cryptocurrency (Bitcoin, Ethereum, Litecoin, USDT and more) on Stake, in your coin's value equivalent.
What slots are similar to Book of 99?
Slots similar to Book of 99 share its volatility profile and provider Relax Gaming. Start with the related slots listed on this page.
Is Book of 99 rigged or fair?
Book of 99 runs on a certified RNG that passes independent audits. Outcomes are random; there are no 'hot' or 'cold' states.
How often does Book of 99 pay?
Hit frequency depends on volatility: a high slot pays less often but larger. This does not change overall RTP.
Can I play Book of 99 on mobile?
Yes, Book of 99 runs directly in the phone browser on Android and iOS — a separate app is usually not required.
What is the minimum bet on Book of 99?
Book of 99 accepts bets from 0.10 per spin.
Where can I play Book of 99 for real money?
Book of 99 is available to play with cryptocurrency on Stake. Deposit and play responsibly. 18+.

18+ · Geo-restrictions apply. Stake.com is not available in all jurisdictions.

Play with code STAKEBONUSHUB
Stake.com · 18+ · T&Cs apply
Get bonus →
⏳ Бонус по промокоду AIGAME--:--Claim →
Играть на Stake · code AIGAMEClaim →

Bonus wheel

+100% deposit
10 free spins
+50% bonus
5% cashback
VIP bonus
Bonus case
+200% deposit
Exclusive