Just For The Win

Book of King Arthur

Slots Video Slots Fantasy Mythology Book Royal Europe Medieval Hero King

Arthurian book-slot format with an optional wild expansion setting

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

96.1%

return to player

Volatility

High volatility

variance

Max win

5,000×

top multiplier

Min bet

$0.20

per spin

Reels

10 lines

Player rating

3.6 ★

19 votes

DEMO Play free, no signup

Just For The Win

Embed on your site

3.6 / 5

19 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 96.1% → 9.0/10

Volatility9/10

high → 9.0/10

Win Potential7.4/10

x5000.00 (5000×) → 7.4/10

Features8/10

13 features → 8.0/10

Game Mechanics4.2/10

f=13 r=5 p=10 → 4.2/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility6/10

0.2–50 (×250) → 6.0/10

Provider Reputation7.1/10

provider avg 7.1 → 7.1/10

Popularity7.5/10

synthetic proxy → 7.5/10

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: 76 — Book of King Arthur by Just For The Win

https://slotranker.com/just-for-the-win/book-of-king-arthur#score

How to cite

Slot Summary

Microgaming partner Just For The Win gives Book of King Arthur an Arthurian reading of the book-slot format. Medieval legend supplies more than the name: a spinning round table selects the bonus symbol. Its identity rests on that meeting of familiar symbol expansion, an arcade-like presentation, and an optional paid setting that changes how wilds behave.

How It Plays

Ordinary combinations follow fixed paylines from the leftmost reel across neighboring reels. The premium symbols can pay with fewer matching appearances than the lower-value symbols, changing which partial combinations count.

The Book performs two jobs on the same screen. It substitutes for ordinary paying symbols in line combinations and also counts independently as a scatter toward bonus entry.

Features & Win Potential

Boost doubles the normal stake and makes arriving wilds cover their entire reels. This changes symbol coverage during ordinary play and free spins, rather than guaranteeing that a wild appears.

Book of King Arthur combines high volatility with a fixed maximum win of 5,000x the stake. Paying for Boost increases the cost of each attempt without turning that ceiling into an expected result.

High volatility Free Spins Scatter Symbol Wild Symbol 5 Reels Expanding Wilds Stacked Symbols Bonus Buy Expanding Symbols RTP range 10 Paylines 96% RTP Bonus Bet

Bonus & Free Spins

Three or more Books award 10 free spins. After ordinary wins are evaluated, enough copies of the selected special symbol expand across their reels and pay across all lines without needing adjacent reels.

The direct free-spins purchase costs 80x the current bet and places at least three Books on the following spin. Boost must be disabled before this purchase becomes available.

Spec sheet

Book of King Arthur at a glance.

Identity

Slot nameBook of King Arthur

StudioJust For The Win

Released4/8/2021

Math

SlotRanker Score76

RTP96.1%

VolatilityHigh volatility

Max win5,000×

Bet range$0.20 – $50.00

Player rating3.6 / 5 · 19 votes

Format

Reels5

Paylines10

Layout5x3

Expected average based on this slot's 96.1% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$3.12

Cost per session$3.12

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 King Arthur? 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 (96.10%), with wins capped at its top multiplier (5,000×).

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 King Arthur

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Compare Book of King Arthur with other games

	Book of King Arthur Score 76This game	Merlin And The Ice Queen Morgana Score 70	Reign Of The Mountain King Score 65	Legend of the Sword Score 65	Midas Book of Alchemy Score 42
Identity
Studio	Just For The Win	Play'n Go	NextGen	Snowborn Games	Silverback Gaming
Released	4/8/2021	11/25/2021	11/24/2021	9/7/2021	7/29/2024
Math
RTP	96.1%	94.2%	96%	94.08%	85.93%
Volatility	High volatility	High volatility	High volatility	High volatility	—
Max win	5,000×	20,000×	10,000×	10,000×	—
Format
Reels	5	5	5	5	5
Layout	5x3	5x3	5x3	5x5	5x3
Paylines	10	10	10	3125	10
Min bet	0.2	0.01	0.1	0.2	0.5
Max bet	50	100	10	24	100
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	—	✓	✓
Scatter symbol	✓	✓	—	✓	✓
Multiplier	—	✓	✓	✓	—
Bonus game	—	—	—	—	—
Respins	—	—	✓	—	—

Every number is shown as a delta against Book of King Arthur.

Comparing against

Book of King Arthur

Just For The Win

RTP

96.1%

Max win

5,000×

Score

Merlin And The Ice Queen Morgana

Reign Of The Mountain King

+ Multiplier+ Respins− Free Spins− Scatter

Midas Book of Alchemy

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01Can Boost and the bonus purchase be used together?

No. The free-spins purchase is unavailable while Boost is active, so the two paid options cannot be combined.

02Does the player choose the expanding bonus symbol?

No. A spinning round table randomly selects the special symbol before free spins begin; the player does not nominate it.

03What RTP does Book of King Arthur offer?

The stated RTP is 96.1% for this configuration. Other configurations exist, so the information panel in the opened game determines the applicable return.

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