Zillion Games

Book of the Cleo

Play Book of the Cleo slot by Zillion Games for free in demo mode! Explore RTP, bonus rounds, and key features before playing for real.

SlotRanker Score

/ 99

05099

The SlotRanker Score is calculated from the visible data below. It is not affected by affiliate deals or paid placement.

How this score is built

RTP

95.35%

return to player

Volatility

High volatility

variance

Max win

1,675×

top multiplier

Min bet

$0.25

per spin

Reels

25 lines

Player rating

3.8 ★

10 votes

DEMO Play free, no signup

Zillion Games

Embed on your site

3.8 / 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 & RTP8/10

RTP 95.35% → 8.0/10

Volatility9/10

high → 9.0/10

Win Potential6.4/10

x1675.00 (1675×) → 6.4/10

Features10/10

11 features → 10.0/10

Game Mechanics7.2/10

f=11 r=5 p=25 → 7.2/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility6/10

0.25–150 (×600) → 6.0/10

Provider Reputation6.7/10

provider avg 6.7 → 6.7/10

Popularity2.5/10

synthetic proxy → 2.5/10

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: 71 — Book of the Cleo by Zillion Games

https://slotranker.com/zillion-games/book-of-the-cleo#score

How to cite

Spec sheet

Book of the Cleo at a glance.

Identity

Slot nameBook of the Cleo

StudioZillion Games

Released7/23/2026

Math

SlotRanker Score71

RTP95.35%

VolatilityHigh volatility

Max win1,675×

Bet range$0.25 – $150.00

Player rating3.8 / 5 · 10 votes

Format

Reels5

Paylines25

Layout5x3

Features

Themes

Expected average based on this slot's 95.35% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$4.65

Cost per session$4.65

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 Cleo? 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: High

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 (High). The model is calibrated so the average return equals this slot's published RTP (95.35%), with wins capped at its top multiplier (1,675×).

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 Cleo

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Compare Book of the Cleo with other games

	Book of the Cleo Score 71This game	Kawaii Neko Score 92	El Dorado The City of Gold Megaways Score 88	Santa Mummy Score 88	Desert Temple Score 88
Identity
Studio	Zillion Games	Naga Games	Pragmatic Play	Belatra Games	Backseat Gaming
Released	7/23/2026	12/25/2022	3/25/2021	12/20/2023	9/10/2024
Math
RTP	95.35%	97.16%	96.58%	96.36%	96.24%
Volatility	High volatility	Medium/High	High volatility	High volatility	High volatility
Max win	1,675×	—	20,000×	25,000×	15,000×
Format
Reels	5	6	6	6	6
Layout	5x3	6x5	6x7	6x5	6x6
Paylines	25	32400	200704	823543	0
Min bet	0.25	0.1	0.2	0.2	0.1
Max bet	150	200	100	50	100
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	—	—
Free spins	✓	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	—	✓	✓	✓	✓
Bonus game	✓	—	—	✓	—
Respins	✓	—	—	—	—

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

Comparing against

Book of the Cleo

Zillion Games

RTP

95.35%

Max win

1,675×

Score

+ Multiplier− Bonus Game− Respins

El Dorado The City of Gold Megaways

+ Multiplier− Bonus Game− Respins

+ Multiplier− Wild− Respins

+ Multiplier− Wild− Bonus Game− Respins

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