IGT

Book of the Sphinx

Slots Video Slots Mythology Fruit Egypt Book Gems Animals

IGT Book slot with a separate mystery-symbol event

SlotRanker Score

/ 99

05099

The SlotRanker Score is calculated from the visible data below. It is not affected by affiliate deals, and it cannot be bought.

How this score is built

RTP

94.22%

return to player

Volatility

Low volatility

variance

Max win

2,500×

top multiplier

Min bet

$0.20

per spin

Reels

20 lines

Player rating

4.1 ★

10 votes

DEMO Play free, no signup

IGT

Embed on your site

4.1 / 5

10 ratings

User ratings are shown separately from the Slot Score unless stated otherwise.

Five weighted signals shape the composite. Four context signals refine ties. See how we rate for the full methodology.

Payouts & RTP6/10

RTP 94.22% → 6.0/10

Volatility6/10

low → 6.0/10

Win Potential6.8/10

x2500.00 (2500×) → 6.8/10

Features7/10

11 features → 7.0/10

Game Mechanics4.6/10

f=11 r=5 p=20 → 4.6/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility6/10

0.2–100 (×500) → 6.0/10

Provider Reputation5.6/10

provider avg 5.6 → 5.6/10

Popularity0/10

synthetic proxy → 0.0/10

Popularity blends real player search demand (~30 markets) with a catalogue-derived proxy; games without measurable search demand use the proxy alone. Not live play telemetry.

Cite this score

SlotRanker Score: 52 — Book of the Sphinx by IGT

https://slotranker.com/igt/book-of-the-sphinx#score

How to cite

Slot Summary

IGT’s entry into the Book slot format adds an Eye of Horus mystery event to the familiar combination of a Book symbol, Free Spins, Wild behavior, and an expanding selected symbol. Book of the Sphinx runs on 20 paylines and places its Egypt and Mythology themes around two separate feature routes. The x2500.00 ceiling comes from filling the reels with the highest selected symbol during Free Spins.

How It Plays

Regular combinations are evaluated across 20 paylines, while the Book symbol serves two purposes as both the Wild Symbol and the Scatter Symbol.

The Eye of Horus provides a separate base-game event. Landing enough Eye symbols makes them reveal one matching regular symbol and expand into full stacks.

Theme & Atmosphere

The Egypt and Mythology themes frame the reels as a tomb-centered Book game, with the sphinx, pharaoh imagery, scarabs, and hieroglyphic objects defining its subject.

Animals, Gems, Fruit, and card values broaden the symbol set, but the Book and Eye imagery keep the presentation focused on its Egyptian feature logic.

Mythology Fruit Egypt Book Gems Animals

Features & Win Potential

The Book substitutes for regular symbols as a Wild Symbol and also triggers Free Spins as a Scatter Symbol when enough copies land.

Eye of Horus mystery symbols reveal one shared regular symbol, then expand into full stacks. This gives the base game an expansion event outside Free Spins.

High volatility Free Spins Scatter Symbol Wild Symbol 5 Reels Gamble Low volatility Book Of...RTP range 20 Paylines Risk/Gamble (Double) game

Bonus & Free Spins

During Free Spins, one regular symbol is selected to expand whenever enough copies appear. The Book symbols can retrigger the round, extending the chance to land that selection.

The initial Free Spins award depends on how many Book symbols trigger the feature, while the expanding selected symbol supplies the round’s main payout route.

Spec sheet

Book of the Sphinx at a glance.

Identity

Slot nameBook of the Sphinx

StudioIGT

Released7/20/2014

Math

SlotRanker Score52

RTP94.22%

VolatilityLow volatility

Max win2,500×

Bet range$0.20 – $100.00

Player rating4.1 / 5 · 10 votes

Format

Reels5

Paylines20

Layout5x3

Features

Themes

Expected average based on this slot's 94.22% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$4.62

Cost per session$4.62

Estimate only, for entertainment purposes — treat gambling as entertainment, not a way to make money, and set a budget you can afford to lose.

How long could a bankroll last on Book of the Sphinx? We simulate thousands of sessions from this game's published RTP and volatility — the long-run math, not a prediction of your next spin.

Bankroll ($)Bet per spin ($)Speed

Volatility tier: Low

Running simulation…

How this works

Each simulated spin either misses or returns a win drawn from a log-normal distribution, with the hit rate and spread set by the slot's volatility tier (Low). The model is calibrated so the average return equals this slot's published RTP (94.22%), with wins capped at its top multiplier (2,500×).

This is a simplified, parametric model of the game's math — not its real paytable. It exists to make the house edge visible over many sessions, so the numbers above are averages across thousands of runs, never a forecast of one.

This is math, not a prediction. Real sessions vary wildly, and no strategy changes a game's built-in house edge. Play for fun, set limits, and never bet more than you can afford to lose.

Where to play Book of the Sphinx

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Compare Book of the Sphinx with other games

	Book of the Sphinx Score 52This game	Osiris Gold Score 73	Book of Xerxes Score 84	Book of Power Score 83	Ecuador Gold Score 83
Identity
Studio	IGT	NetGame Entertainment	Apparat Gaming	Relax Gaming	ELK Studios
Released	7/20/2014	12/28/2022	10/30/2024	3/8/2023	2/19/2019
Math
RTP	94.22%	96.32%	96.11%	96.11%	96.1%
Volatility	Low volatility	Medium volatility	High volatility	High volatility	High volatility
Max win	2,500×	2,640×	15,000×	15,000×	—
Format
Reels	5	5	5	5	6
Layout	5x3	5x3	5x3	5x3	6x4
Paylines	20	243	262144	5	262144
Min bet	0.2	0.2	0.2	0.1	0.2
Max bet	100	100	100	30	100
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	—	✓	✓	✓	✓
Bonus game	—	—	✓	—	✓
Respins	—	—	—	—	—

Every number is shown as a delta against Book of the Sphinx.

Comparing against

Book of the Sphinx

IGT

RTP

94.22%

Max win

2,500×

Score

Osiris Gold

NetGame Entertainment

+ Multiplier+ Bonus Game

+ Multiplier+ Bonus Game

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