Spearhead Studios

Book of Spies Mission X

RARE Slots Video Slots Action & Adventure Science Spy Military Guns Thief

Modern espionage within the expanding-symbol book-slot tradition

Only 0.1% of slots feature Xways.

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

27,000×

top multiplier

Min bet

$0.20

per spin

Reels

1024 lines

Player rating

4.2 ★

11 votes

DEMO Play free, no signup

Spearhead Studios

Embed on your site

4.2 / 5

11 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 Potential8.9/10

x27000.00 (27000×) → 8.9/10

Features8.5/10

14 features → 8.5/10

Game Mechanics6.2/10

f=14 r=5 p=1024 → 6.2/10

Context signals (tie-breakers)

Layout5/10

5x4 → 5.0/10

Bet Flexibility6/10

0.2–100 (×500) → 6.0/10

Provider Reputation6.5/10

provider avg 6.5 → 6.5/10

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: 79 — Book of Spies Mission X by Spearhead Studios

https://slotranker.com/spearhead-studios/book-of-spies-mission-x#score

How to cite

Slot Summary

An enemy spymaster's digital vault is the target in Book of Spies Mission X, a secret-agent slot from Spearhead Studios. Its espionage premise accompanies a more elaborate take on the expanding-symbol book format, bringing mystery-symbol expansion and nudging wilds into the same operation. The high-volatility profile suits that emphasis on combinations of effects.

How It Plays

Matching symbols pay from left to right across adjacent reels. The game evaluates ways rather than fixed lines, adding together qualifying wins that occur simultaneously.

An xWays mystery symbol opens into several matching symbols, increasing the height of its reel. All mystery symbols revealed on the same screen resolve into the same paying symbol.

Bonus & Free Spins

Scatters on the first, third, and fifth reels trigger Secret Agent Free Spins. Their downward nudges determine the spin award, while a randomly selected premium symbol can expand across qualifying reels during the feature.

Spec sheet

Book of Spies Mission X at a glance.

Identity

Slot nameBook of Spies Mission X

StudioSpearhead Studios

Released10/27/2020

Math

SlotRanker Score79

RTP96.1%

VolatilityHigh volatility

Max win27,000×

Bet range$0.20 – $100.00

Player rating4.2 / 5 · 11 votes

Format

Reels5

Paylines1024

Layout5x4

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 Spies Mission X? 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 (27,000×).

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 Spies Mission X

No matching casinos for your region yet

Casino availability depends on where you play from. We only show casinos that accept players from your country.

Compare Book of Spies Mission X with other games

	Book of Spies Mission X Score 79This game	Apocalypse Super Nudge Score 88	The Expendables Megaways Score 83	Gamdom Strike Score 82	Mr and Mrs Spy Score 82
Identity
Studio	Spearhead Studios	NoLimit City	StakeLogic	Caleta Gaming	Infinity Dragon Studios
Released	10/27/2020	7/23/2024	2/20/2020	4/2/2021	10/26/2022
Math
RTP	96.1%	96.03%	96.02%	96.73%	96.11%
Volatility	High volatility	High volatility	High volatility	—	High volatility
Max win	27,000×	20,000×	26,965×	15,000×	12,000×
Format
Reels	5	6	6	5	5
Layout	5x4	6x4	6x7	5x3	5x3
Paylines	1024	4096	117649	243	10
Min bet	0.2	0.2	0.2	0.6	0.1
Max bet	100	100	20	180	20
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	✓	✓	—
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	—	✓	—	✓	✓
Bonus game	—	—	—	✓	✓
Respins	—	—	—	—	✓

Every number is shown as a delta against Book of Spies Mission X.

Comparing against

Book of Spies Mission X

Spearhead Studios

RTP

96.1%

Max win

27,000×

Score

Apocalypse Super Nudge

The Expendables Megaways

+ Multiplier+ Bonus Game

Mr and Mrs Spy

Infinity Dragon Studios

+ Multiplier+ Bonus Game+ Respins− Free Spins

Explore More Games with Similar RTP

	Provider	RTP	Volatility	Max win	Score
Monkey Bonanza	Northern Lights Gaming	96.06%	High volatility	52,000×	87
Olympus Raging Megaways	iSoftbet	96.07%	High volatility	25,000×	87
JunglePop	AvatarUX	96.08%	High volatility	50,000×	88
Gluttony	NoLimit City	96.09%	High volatility	32,000×	88
Hypernova Megaways	ReelPlay	96.09%	High volatility	8,641×	80
Book of Spies Mission X	Spearhead Studios	96.1%	High volatility	27,000×	79
Pond of Plinko	Print Studios	96.1%	High volatility	30,000×	91
Big Bucks Bandits	ReelPlay	96.1%	High volatility	10,000×	84
Chilli Bandits	SlotMill	96.11%	High volatility	15,000×	87
Aussies Vs Emus	Blue Guru Games	96.12%	High volatility	—	88
Super Rainbow Megaways	1X2gaming	96.13%	High volatility	35,000×	88