KA Gaming

Book of Skull

RARE Slots Video Slots Horror Book Darkness Magic

Play Book of Skull slot by KA Gaming for free in demo mode! Explore RTP, bonus rounds, and key features before playing for real.

Only 0.06% of slots combine 20 Paylines and Book Of....

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

90%

return to player

Volatility

—

variance

Max win

—

top multiplier

Min bet

$0.20

per spin

Reels

20 lines

Player rating

3.7 ★

1 votes

DEMO Play free, no signup

KA Gaming

Embed on your site

3.7 / 5

1 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 & RTP1/10

RTP 90% → 1.0/10

Volatility8/10imputed

imputed medium (unknown) → 8.0/10

Win Potential—

no data

Features5.5/10

8 features → 5.5/10

Game Mechanics4.6/10

f=8 r=5 p=20 → 4.6/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility8/10

0.2–300 (×1500) → 8.0/10

Provider Reputation4.8/10

provider avg 4.8 → 4.8/10

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: 36 — Book of Skull by KA Gaming

https://slotranker.com/ka-gaming/book-of-skull#score

How to cite

Spec sheet

Book of Skull at a glance.

Identity

Slot nameBook of Skull

StudioKA Gaming

Released3/6/2024

Math

SlotRanker Score36

RTP90%

Max win—

Bet range$0.20 – $300.00

Player rating3.7 / 5 · 1 votes

Format

Reels5

Paylines20

Layout5x3

Features

Themes

Expected average based on this slot's 90% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$8.00

Cost per session$8.00

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 Skull? 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 (90.00%), with wins capped at its top multiplier (1,000×).

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.

Compare Book of Skull with other games

	Book of Skull Score 36This game	The Watcher Score 81	Wicked Witch Score 75	Book of Halloween Score 72	Devil's 13 Score 67
Identity
Studio	KA Gaming	StakeLogic	Habanero	Inspired	Pragmatic Play
Released	3/6/2024	10/28/2024	12/20/2015	10/5/2019	8/12/2015
Math
RTP	90%	96.01%	95.98%	96.23%	95.06%
Volatility	—	High volatility	Medium volatility	High volatility	—
Max win	—	9,000×	—	—	13,000×
Format
Reels	5	6	5	5	5
Layout	5x3	6x6	5x3	5x3	5x3
Paylines	20	40	20	10	13
Min bet	0.20	0.20	0.20	0.10	0.13
Max bet	300.00	100.00	5000.00	5.00	65.00
Features
Progressive	—	—	✓	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	—	✓	✓	—	—
Bonus game	—	—	—	—	✓
Respins	—	—	—	—	—

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

Comparing against

Book of Skull

KA Gaming

RTP

90%

Max win

—

Score

+ Progressive+ Multiplier

Explore More Games with Similar RTP

	Provider	RTP	Volatility	Max win	Score
Oktoberfest	Amatic	89.84%	—	—	33
Book of Skull	KA Gaming	90%	—	—	36
Panda Blitz	Rarestone Gaming	90%	High volatility	—	58
ClawBass Bonanza	Clawbuster	90.02%	High volatility	6,000×	59
Fruletta	Endorphina	90.03%	High volatility	—	43
Pin-Up	Endorphina	90.04%	—	—	36
Lotus Geisha	Triple Cherry	90.11%	Low/Medium	650×	34
Trojan Chickens Deluxe	Triple Cherry	90.16%	Medium/High	660×	46
Triple Pop Bubblegum	Incredible Technologies	90.17%	High volatility	3,000×	51
Blood Moon Riches	Triple Cherry	90.19%	Medium/High	600×	43
Nile Treasures Deluxe	Triple Cherry	90.2%	Medium/High	3,783×	49