Written By Mike Davies
| 🎰 Slot Name | Book of the Sphinx |
|---|---|
| 💻 Software Developer | IGT |
| ℹ️ RTP | 94.22% |
| 💰 Progressive Jackpot | No |
| 🆓 Free Spins | Yes |
| ⬆️ Betting Limits | $0.20 – $100 |
| 💳 Paylines | 5 Reels, 20 Paylines |
| ▶️ Alternative Slots | Treasures of Troy |
| 📑 Release Date | 07/20/2014 |
| 📱 Mobile Compatibility | Yes |
Embark on an odyssey with us in this Book of the Sphinx slot review, where you’ll unearth its enigmatic reels and explore the top US casinos for online adventures. We’ll dissect the game’s RTP, and decipher the Book of the Sphinx bonus mechanics. Plus, we’ll guide you to akin slots for extended thrills, so stay tuned!
Book of the Sphinx is an online slot game by IGT. It has a 94.22% payout rate. It comes with 20 paylines on 5 reels and the following features – gamble, scatter symbols, wild, and free spins. Book of the Sphinx is available to US players as a free demo or for real money with a $100 max bet.
When it comes to diving headfirst into the Book of the Sphinx slot, readers will be glad to discover that this slot is available for real money play at many licensed online casinos in the USA. Currently accessible in Michigan, New Jersey, Pennsylvania, and West Virginia, we anticipate broader availability soon and will keep you informed.
If you’re a resident of these legal gambling states, you’ll find consistent gameplay features across all casinos offering this captivating slot, so never feel like you’re missing out. Meanwhile, check out our table below showcasing the best Book of the Sphinx online slot casinos for US players in 2025.
| Position | Online Casino | Rating | Bonus | Payments & Software Providers | Payout rate | Payout duration | All Slots by IGT | Secure Link | Bonus Terms |
|---|---|---|---|---|---|---|---|---|---|
 | |||||||||
| 1 | Hard Rock Casino | 5.0/5 | 100% up to $1,000 + $25 Casino Bonus |
Instant Bank Transfer, Visa, Mastercard, American Express, PayPal, Venmo, Play+, Apple Pay
AGS, Ainsworth, Aristocrat, Bally, , BetDigital, Bragg, Big Time Gaming, Crucible Gaming, DWG, ELK Studios, Everi, Evolution, Fantasma, GameCode, Games Global, Gaming Realms, Hacksaw, High 5 Games, IGT, Incredible Technologies, Inspired, Konami, Lightning Box, Light & Wonder, NetEnt, NextGen, Nolimit City, NYX, Pariplay, Pixiu, Play'n GO, Playtech, Playzido, Red7, Red Tiger, ReelPlay, SG Digital, Shufflemaster, Side City, Slotmill, Spin Games, Spinberry, Wazdan, White Hat Gaming, Wild Streak, WMS |
Instant, $10 - Unlimited | 96.00% | 2,700+ | Play Now! | 21+. T&C's apply. Gambling Problem? Call 1-800 GAMBLER. Please gamble responsibly. Players are eligible for only one First Deposit Casino Cash Match. The maximum bonus given to any player is $1,000. A minimum deposit of $20 is required to be eligible for the bonus. Players need to opt-in to qualify for the welcome offer. This offer cannot be combined with any other offer. To be eligible to withdraw the bonus funds, players must wager 20 times the Bonus+deposit related to bonus amount. Players have 14 days to complete the wagering requirement or all bonus funds including bonus winnings will be forfeited. Games will contribute differently to the wagering requirements. |
| 2 | BetRivers | 4.9/5 | Up to $500 Casino Losses Back |
Visa, Mastercard, Discover, American Express, Venmo, Online Banking, PayPal, Play+, PayNearMe, VIP Preferred ACH
NetEnt, Big Time Gaming, Games Global, IGT, Evolution, Playtech, Red Tiger, Light & Wonder, Hacksaw Gaming, NextGen, Greentube, Reel Play, Spin Games, Gaming Realms, Atomic Slot Lab, 4ThePlayer, Gold Coin Studios, Gameburger Studios, High 5 Games, Play’n GO, Just For The Win, Blueprint, Amaya, Inspired Gaming, Everi, All For One Studios, Ainsworth, Wild Streak Gaming, 2by2 Gaming, WMS, Rarestone Gaming, Aristocrat |
96.00% | Instant, $10 - Unlimited | 3,120+ | Play Now! | Full T&Cs apply. Deposit with code: CASINO500 for 100% up to $500 on your first deposit. Match bonus applied within 48 hours after claiming. Only one CASINO500 code may be utilized across all associated websites. Wagering 10x. Full terms & conditions apply. |
| 3 | Ceasars Palace | 4.8/5 | 100% up to $1,000 + $10 Sign Up Bonus |
Visa, Mastercard, Discover, Amercan Express, VIP Preferred, Online Banking, Play+ Card, PayPal, Venmo, Interac e-Transfer, PayNearMe
NetEnt, Playtech, IGT, WMS, Konami |
96.00% | Instant, $10 - Unlimited | 1,900+ | Play Now! | Full T&Cs apply. NJ only. 21+. New users only. Know When To Stop Before You Start.® Gambling Problem? If you or someone you know has a gambling problem, crisis counseling and referral services can be accessed by calling 1-800-GAMBLER (1-800-426-2537). Terms & conditions apply. |
| 4 | JackpotCity | 4.8/5 | 100% up to $1,000 + 20 Free Spins |
Visa, Mastercard, Discover, Venmo, VIP Preferred, PayPal, Skrill, Apple Pay, Play+
Foxium, AGS, Triple Edge Studios, Gameburger Studios, All41 Studios, NetEnt, StormCraft Studios, 2by2 Gaming, Neon Valley Studios, JFTW, Circular Arrow, Lightning Box, Games Global, IGT, Light & Wonder, Snowborn Games, Fortune Factory Studios, High Limit Studio, Oros Gaming, Evolution |
96.00% | Instant, $10 - Unlimited | 500+ | Play Now! | New verified customers, present in NJ, PA only. 21+. Opt-in required. Deposit match on first deposit, up to max $1,000 in bonus funds. Min wagering req. applies. Casino bonus funds expiration applies. Subject to full T&C. Gambling problem? Call 1-800-GAMBLER |
| 5 | Spin Palace | 4.7/5 | 100% up to $1,000 + 20 Bonus Spins |
Visa, Mastercard, Discover, Venmo, VIP Preferred, PayPal, Skrill, Apple Pay, Play+
Foxium, AGS, Triple Edge Studios, Gameburger Studios, All41 Studios, NetEnt, StormCraft Studios, 2by2 Gaming, Neon Valley Studios, JFTW, Circular Arrow, Lightning Box, Games Global, IGT, Light & Wonder, Snowborn Games, Fortune Factory Studios, High Limit Studio, Oros Gaming, Evolution |
96.00% | Instant, $10 - Unlimited | 500+ | Play Now! | T&Cs apply. Spin Palace Deposit Match and Bonus Spins Slots Welcome Offer - 100% Match. Receive a 100% First Deposit Match up to a Max of $1,000 as Casino Bonus Funds and 20 Bonus Spins. |
Our reader’s security is our utmost priority, which is why you feel safe opting for our endorsed online casinos featuring Book of the Sphinx slots – we exclusively recommend trustworthy sites with player protections intact. While it’s regrettable that the entire US can’t yet enjoy this slot for real money, we’re optimistic about evolving gambling laws.
Alongside top-tier slot titles, these casinos boast classics like roulette, poker, and more. You should explore them at your leisure to find the latest releases, each offering a diverse gaming experience that you can relish. By the end, we hope that this Book of the Sphinx slot review will help you choose wisely and revel in the best!
While we don’t feature a Book of the Sphinx demo directly, you can easily find one online at various game catalog sites. Trying out the free version is a great way to explore the game’s mechanics and features without spending real money.
The Book of the Sphinx slot is the latest addition to the long tapestry of Ancient Egypt-themed slots and emerges from the creative loom of Speilo. For slot enthusiasts still keen on pharaohs, hieroglyphs, and pyramids, this slot contains three-rows, five-reels, and 20-payline. The action unfolds with a brisk pace – just set your betting lines and embark down the Nile.
The reel grid, nestled within an ornate temple, boasts golden coins upon stone floors. A fiery ambiance, with crimson and orange hues, emanates from the temple, a familiar yet enchanting sight in the realm of Egyptian-themed slots.
Here’s a taster of what to expect:
| ▶️ Type of Slot | Video Slot |
|---|---|
| ▶️ Payout Rate | 94.22% |
| ▶️ Theme | Ancient Civilization |
| ▶️ Reels | 5 |
| ▶️ Rows | 3 |
| ▶️ Paylines | 20 |
| ▶️ Free Spins | Yes |
| ▶️ Betting Limits | $0.20 – $100 |
| ▶️ Bonus Round | Yes |
|---|---|
| ▶️ Progressive Jackpot | No |
| ▶️ Multiplier | No |
| ▶️ Gamble | Yes |
| ▶️ Autoplay | Yes |
| ▶️ Quick Spin | No |
| ▶️ Coin Levels | 1 |
| ▶️ Adjustable Paylines | No |
The Book of the Sphinx slot caters to diverse budgets with consistent betting limits across all US online casinos. From cautious players at $0.20 per spin to daring high-rollers at $100, flexibility reigns. Amidst the ancient allure, wilds and free spins await, infusing the reels with excitement.
These features add zest and zeal to real money wagers, enhancing the thrill of the game. In addition, a win meter on the Book of the Sphinx slot game’s UI shows your earnings and pay lines so you can keep track of your progress as you play.
Regrettably, the Book of the Sphinx slot RTP is 94.22%, which is somewhat underwhelming compared to the market average of approximately 96%. This means the slot’s potential returns are relatively lower. Among its 13 symbols, you’ll find a mix of low-ranking playing cards and iconic Egyptian motifs like scarabs and hieroglyphs.
However, reigning supreme is the Pharaoh, the most valuable symbol in the game. Despite the slightly disappointing RTP, the fact that the Book of the Sphinx slot still offers some chances to win bigger payouts with its special bonus features. Here’s a quick preview of what to expect:
| RTP Rate: | Highest Paying Symbol: | All Symbols: | Paylines: | Max. Win |
|---|---|---|---|---|
| 94.22% | Pharaoh | 13 | 20 | 2,500 x stake per spin |
As you can see, the Book of the Sphinx slot offers a max win of 2,500x your original spin, which can be acquired easiest by aligning five Pharaoh symbols. The pinnacle jackpot is set at $4,000.
The Gamble feature can be triggered after a standard pay win. This allows players to engage in a thrilling 50/50 gamble, where doubling your winnings hinges on predicting a face-down card’s color. A bold play, or a wrong guess, can wipe it all out. Players can attempt five correct guesses before this nail-biting feature concludes.
However, if the RTP is a dealbreaker for you, we’d like to suggest other rustic-themed slots with higher RTPs and enticing bonuses such as Gypsy Riches or El Dorado.
Finally, let’s get into the nitty-gritty of the Book of the Sphinx bonuses. Bonuses abound in the Book of the Sphinx slot, starting with exhilarating free spins. Land three book symbols for 10 free spins, four for 15, or five for a dazzling 30 spins.
An intriguing twist awaits with the ‘Eye of Horus’ bonus – unveil three to five eye icons to activate this unique feature. Horus symbols morph into higher-paying symbols at random, cranking up your winning potential.
Interestingly, the book icon, named after the slot title, can also act as a wild or scatter symbol and be used to replace most symbols, except the Eye of Horus. For a quick visual preview, see below:
Regrettably, during our testing of the Book of the Sphinx slot online, the fruits of its bonuses remained elusive due to the relatively low RTP rate. A higher RTP is pivotal in fostering the trust of slot enthusiasts, ensuring that their gameplay investment aligns with favorable returns.
With a more generous payout potential, players can approach bonus features with heightened anticipation, confident that their pursuit of ancient riches is met with a greater chance of success. Hopefully the developers will reboot this slot with a higher RTP, which will undoubtedly lead to a more gratifying gaming experience.
Mike is one of our most senior team members and contributes with over 20 years of experience in the gambling industry. He’s our online and land-based casino review expert and a blackjack enthusiast. Mike’s a table games strategist and is dedicated to helping you make informed decisions.
While the gaming landscape is no stranger to Egyptian-themed slots, this title distinguishes itself in my opinion. Unlike its counterparts, it skips the usual multipliers but compensates with generous free spins and expanding bonus symbols, creating pathways to gratifying wins.
Originality might not be its cornerstone, yet the game’s well-crafted mechanics offer a satisfying enough experience. However, this slot’s RTP is the most disappointing factor. However, if you’re ready to navigate the sands of fortune and take calculated chances, Book of the Sphinx will entice you with its unique blend of familiarity and excitement.
