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Book of Abyss

Slots Video Slots Mystery Underworld Book Darkness

Play Book of Abyss slot by Just Slots 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, and it cannot be bought.

How this score is built

RTP

94.31%

return to player

Volatility

—

variance

Max win

15,000×

top multiplier

Min bet

$0.10

per spin

Reels

10 lines

Player rating

4.5 ★

3 votes

DEMO Play free, no signup

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Embed on your site

4.5 / 5

3 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 94.31% → 6.0/10

Volatility8/10imputed

imputed medium (unknown) → 8.0/10

Win Potential8.4/10

x15000.00 (15000×) → 8.4/10

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)

Layout5/10

3x5 → 5.0/10

Bet Flexibility6/10

0.1–60 (×600) → 6.0/10

Provider Reputation6.5/10

provider avg 6.5 → 6.5/10

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: 55 — Book of Abyss by Just Slots

https://slotranker.com/just-slots/book-of-abyss#score

How to cite

Spec sheet

Book of Abyss at a glance.

Identity

Slot nameBook of Abyss

StudioJust Slots

Released11/12/2025

Math

SlotRanker Score55

RTP94.31%

Max win15,000×

Bet range$0.10 – $60.00

Player rating4.5 / 5 · 3 votes

Format

Reels5

Paylines10

Layout3x5

Features

Themes

Expected average based on this slot's 94.31% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$2.28

Cost per session$2.28

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 Abyss? 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: Mediumassumed — not published for this slot

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 (Medium). The model is calibrated so the average return equals this slot's published RTP (94.31%), with wins capped at its top multiplier (15,000×).

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 Abyss

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Compare Book of Abyss with other games

	Book of Abyss Score 55This game	The Watcher Score 81	Legacy of Tombs Score 75	Moon Spell Score 74	Book of the Damned Score 67
Identity
Studio	Just Slots	StakeLogic	BF games	Red Tiger Gaming	Rival Gaming
Released	11/12/2025	10/28/2024	9/20/2023	10/17/2024	10/9/2025
Math
RTP	94.31%	96.01%	96.09%	95.76%	96.11%
Volatility	—	High volatility	High volatility	High volatility	High volatility
Max win	15,000×	9,000×	5,532×	5,224×	10,000×
Format
Reels	5	6	5	5	5
Layout	3x5	6x6	5x3	5x3	5x3
Paylines	10	40	10	20	10
Min bet	0.1	0.2	0.1	0.1	0.1
Max bet	60	100	50	10	12.5
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	✓	—	✓
Scatter symbol	✓	✓	✓	—	✓
Multiplier	—	✓	—	✓	—
Bonus game	—	—	—	✓	—
Respins	—	—	—	✓	—

Every number is shown as a delta against Book of Abyss.

Comparing against

Book of Abyss

Just Slots

RTP

94.31%

Max win

15,000×

Score

+ Multiplier+ Bonus Game+ Respins− Free Spins− Scatter

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01What is the RTP of Book of Abyss?

The RTP of Book of Abyss is 94.31%.

02Can I play Book of Abyss without making a deposit?

While there’s no free version of Book of Abyss, new players can claim a welcome bonus to test the game with bonus funds.

03Does Book of Abyss work on mobile devices?

Yes, Book of Abyss is fully compatible with mobile devices.

04Is Book of Abyss available in real-money casinos?

Book of Abyss is featured in many real-money casinos where you can bet and win.

05What’s the biggest win Book of Abyss has to offer?

The most you can win from a single spin in Book of Abyss is x15000.00 your bet.Depending on the combinations of features, you can win up to x15000.00 your bet in Book of Abyss.

06Can the bonus game in Book of Abyss be triggered via Bonus Buy?

Unfortunately, Bonus Buy is not available in Book of Abyss.

07Does Book of Abyss give players Free Spins as a reward?

Free Spins are an important part of the bonus mechanics in Book of Abyss.

08Is Book of Abyss one of the Megaways games?

The game does not feature Megaways functionality.

09Can players hit a progressive jackpot in Book of Abyss?

Unfortunately, there is no progressive jackpot in Book of Abyss.

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