Rival Gaming

Book of the Damned

Slots Video Slots Horror Mystery Book Darkness

Rival Gaming horror Book slot with post-win risk decisions

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

96.11%

return to player

Volatility

High volatility

variance

Max win

10,000×

top multiplier

Min bet

$0.10

per spin

Reels

10 lines

Player rating

4.9 ★

8 votes

DEMO Play free, no signup

Rival Gaming

Embed on your site

4.9 / 5

8 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 & RTP9/10

RTP 96.11% → 9.0/10

Volatility9/10

high → 9.0/10

Win Potential8/10

x10000.00 (10000×) → 8.0/10

Features4.5/10

6 features → 4.5/10

Game Mechanics4.2/10

f=6 r=5 p=10 → 4.2/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility6/10

0.1–12.5 (×125) → 6.0/10

Provider Reputation6.4/10

provider avg 6.4 → 6.4/10

Popularity5/10

synthetic proxy → 5.0/10

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: 67 — Book of the Damned by Rival Gaming

https://slotranker.com/rival-gaming/book-of-the-damned#score

How to cite

Slot Summary

Bank a win or risk half or all of it in the Gamble feature. Book of the Damned makes that decision the sharpest expression of its high-volatility profile, though the 96.11% RTP and x10,000 ceiling frame the wider math. Rival Gaming then shifts the bonus toward Free Spins, where a selected symbol can expand across full reels under the game's dark Book theme.

How It Plays

Ten paylines carry the standard game, while the Book Symbol performs two jobs: it substitutes as a Wild Symbol and counts as the Scatter Symbol.

After eligible wins, the Risk/Gamble game creates a separate decision. Half or all of the award can be placed at risk for a possible doubled return.

Theme & Atmosphere

Book, Darkness, Horror, and Mystery define the setting, presenting forbidden knowledge as a source of both the bonus trigger and the game's central risk.

The darker treatment suits the mechanics because opening the Book can change a regular symbol into a full-reel presence throughout the Free Spins round.

Horror Mystery Book Darkness

Features & Win Potential

The RTP range means the available return setting can vary, with 96.11% representing the top published configuration found for the game.

Expanding Reels concentrate the largest symbol transformations inside Free Spins, while the Risk/Gamble game adds a voluntary double-or-lose decision after qualifying wins.

Free Spins Scatter Symbol Wild Symbol Expanding Reels RTP range Risk/Gamble (Double) game

Bonus & Free Spins

Landing 3 or more Book Scatter Symbols triggers Free Spins. Before the round begins, one regular symbol is chosen to become the expanding symbol.

When the selected symbol lands during Free Spins, it can cover full reels. Additional Book Scatter Symbols can retrigger the round and extend its opportunities.

Spec sheet

Book of the Damned at a glance.

Identity

Slot nameBook of the Damned

StudioRival Gaming

Released10/9/2025

Math

SlotRanker Score67

RTP96.11%

VolatilityHigh volatility

Max win10,000×

Bet range$0.10 – $12.50

Player rating4.9 / 5 · 8 votes

Format

Reels5

Paylines10

Layout5x3

Features

Themes

Expected average based on this slot's 96.11% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$1.56

Cost per session$1.56

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 Damned? 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 (96.11%), with wins capped at its top multiplier (10,000×).

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 Damned

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Compare Book of the Damned with other games

	Book of the Damned Score 67This game	The Watcher Score 81	Devils Number Score 72	The Twin Wins Mystery Score 66	Ghost Slider Score 60
Identity
Studio	Rival Gaming	StakeLogic	Red Tiger Gaming	Mancala Gaming	Merkur Gaming
Released	10/9/2025	10/28/2024	4/11/2019	11/25/2021	5/17/2015
Math
RTP	96.11%	96.01%	95.05%	95%	95.75%
Volatility	High volatility	High volatility	High volatility	High volatility	Medium volatility
Max win	10,000×	9,000×	2,520×	5,740×	5,000×
Format
Reels	5	6	5	5	5
Layout	5x3	6x6	5x4	5x3	5x3
Paylines	10	40	30	25	10
Min bet	0.1	0.2	0.1	—	0.2
Max bet	12.5	100	200	—	20
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	—	✓	—	✓	—
Bonus game	—	—	—	—	—
Respins	—	—	—	—	—

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

Comparing against

Book of the Damned

Rival Gaming

RTP

96.11%

Max win

10,000×

Score

The Twin Wins Mystery

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