Book of the Cleo

Book of the Cleo

Zillion Games · Slots · Egyptian
  • Reels5

Book of the Cleo by Zillion Games plunges players into ancient Egypt where Cleopatra, golden treasures, and mystical books unlock hidden rewards across a 5×3 grid. High volatility, 25 paylines, and a 1675x max win potential – this slot stacks expanding symbols, sticky wilds, Hold and Win respins, and a bonus game into one packed feature set. Sharp mechanics, not filler.

Book of the Cleo
Provider Zillion Games
Reels 5
Release date July 23, 2026

Play this slot Free Demo

Demo version coming soon on this site. No registration required when live. Test the Hold and Win mechanic and Free Spins before committing real money.

Demo isn’t available for this game yet.

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Provider Zillion Games
Game Type Slots
Series Egyptian

Where to play this game

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How this slot Pays

The game runs on a 5×3 layout with 25 paylines and a 95.35% RTP at high volatility. Bets range from 0.25 to 150 per spin, targeting a max win of 1675x the stake. The core mechanic hinges on scatter symbols triggering Free Spins and a bonus game, while expanding symbols and sticky wilds lock in wins during respins. A symbol collection feature (Energy) feeds into fixed jackpots – the more you gather, the closer you get to the top prize.

Expanding Symbols and Sticky Wilds

Expanding symbols grow to fill entire reels when they land, multiplying ways to connect across the 25 paylines. Sticky wilds remain locked during respins, forcing the reels to spin around them. This combo is where the slot grows teeth in the base game – one good reel can cascade into a small cluster of locked positions on the next spin. Not a guarantee, but the friction of waiting for the sticky to hold makes the payoff sharper when it lands.

Hold and Win / Respins

Hold and Win mechanics lock high-value symbols in place and award respins to fill the grid. Each respin counter resets when a new symbol lands on the locked positions or when a wild appears. This is the engine of mid-game runs – trigger it early, and the game can chain respins into a solid cash-out. No progressive timer, so the pressure is pure: land or lose the hold.

Free Spins and Bonus Game

Scatter symbols unlock Free Spins and a dedicated bonus game. Free Spins inherit the expanding and sticky mechanics from the base, meaning the same expanding/wild combos can fire during the feature. The bonus game layer adds another payout path – exact rules and coin values are not fully itemized in current documentation, but the slot promises fixed jackpots tied to symbol collection. Players should verify bonus trigger thresholds and payout schedules with the operator before play.

Bet Range and Max Win

Metric Value
Min Bet 0.25
Max Bet 150
Max Win 1675x stake
RTP 95.35%
Volatility High

The wide bet range lets both micro-stakers and high-rollers dial in their comfort zone. A 1675x ceiling at high volatility means long dry spells are real – but when the Hold and Win or Free Spins align with expanding symbols, the payoff can justify the wait.

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Pros

  • 95.35% RTP is solid for high-volatility Egyptian slots
  • Hold and Win respins lock in wins without a timer drain
  • Expanding symbols and sticky wilds create natural clustering
  • 25 paylines and 5x3 grid offer dense coverage
  • Fixed jackpots reward symbol collection over time
  • Bet range 0.25-150 suits most bankroll sizes

Cons

  • High volatility means base game can feel flat for 50+ spins
  • Symbol collection (Energy) mechanic lacks detailed payout breakdown

FAQ

What is the RTP and how does it compare to other Egyptian slots?

this slot holds a 95.35% RTP at high volatility. This sits in the middle of the Egyptian slot range - competitive, but not exceptional. Operators may offer alternative RTP tiers; always check your casino's game settings before play.

How do Hold and Win respins work?

When Hold and Win triggers, high-value symbols lock in place and the reels respin around them. Each new symbol or wild that lands on the locked positions resets the respin counter. If no new symbols land on the locked grid, the feature ends and payouts are calculated. This mechanic has no timer - it runs until the grid fills or no new symbols appear.

What is the symbol collection (Energy) feature?

The symbol collection feature tracks Energy symbols gathered during play. As the collection grows, players move closer to fixed jackpots. Exact collection thresholds and jackpot amounts are not fully itemized in current sources - players should consult the game's paytable or operator for the full breakdown.

What is the max win and how often can players expect to hit it?

The max win is 1675x the stake. At high volatility with a 95.35% RTP, this ceiling is rare - expect long dry spells between significant wins. Hold and Win respins combined with Free Spins and expanding symbols offer the best paths to the top prize, but no hit frequency is disclosed.

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Raymonds Ozols
Raymonds Ozols
Games Analyst

Raymonds has spent over a decade covering online casino games, focused on RTP verification, volatility models and the gap between how games are marketed and how they actually run. He covers crash games, instant formats and slot variance across EU and UK regulated markets — starting always from the certified RNG documentation, not the promo copy. He writes for 100slots.org and several other iGaming publications.

Reviewed by Marcus Reynolds – Senior Game Analyst

Editorial rating: 3.9/5

this slot delivers a solid Egyptian adventure with Hold and Win respins and expanding symbols doing the heavy lifting. High volatility and a 95.35% RTP make it a fair-odds game, but the base game can feel sparse between features. The symbol collection mechanic adds depth, though full payout details need verification. For players who enjoy mechanical friction and don't mind dry spells, this slot earns its place.

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