NetEnt

Golden Grimoire

Slots Video Slots Fantasy Magic Horror Mystery Book Gems Love

NetEnt spellbook slot centered on row-wide Mystery transformations

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

96.44%

return to player

Volatility

Low volatility

variance

Max win

200×

top multiplier

Min bet

$0.20

per spin

Reels

40 lines

Player rating

3.7 ★

20 votes

DEMO Play free, no signup

NetEnt

Embed on your site

3.7 / 5

20 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 96.44% → 9.0/10

Volatility6/10

low → 6.0/10

Win Potential4.6/10

x200.00 (200×) → 4.6/10

Features10/10

15 features → 10.0/10

Game Mechanics5.8/10

f=15 r=5 p=40 → 5.8/10

Context signals (tie-breakers)

Layout5/10

5x4 → 5.0/10

Bet Flexibility8/10

0.2–400 (×2000) → 8.0/10

Provider Reputation7.3/10

provider avg 7.3 → 7.3/10

Popularity3.6/10

search demand p41 + proxy blend (70/30) → 3.6/10

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: 70 — Golden Grimoire by NetEnt

https://slotranker.com/netent/golden-grimoire#score

How to cite

Slot Summary

In February 2019, NetEnt released Golden Grimoire as a transformation-led Magic slot rather than a conventional Book game. Mystery Symbols can change into matching symbols and spread that identity across a row, making the spellbook an active part of the result. Free Spins retain those Mystery positions between spins, shifting attention from isolated payouts to the growing value of fixed transformation points.

How It Plays

The 5x4 grid starts with ordinary line evaluation, but the spellbook can revise a row after the reels settle. That delayed transformation supplies the base game’s main decision point.

Wild Symbol substitution supports regular combinations, while the Mystery result can create broader matching coverage. The two systems interact without requiring a separate pick game or prize wheel.

Theme & Atmosphere

Book, Magic, Mystery, Fantasy, and Horror themes meet in an occult study filled with spellcraft references. The tone favors secret knowledge over heroic adventure.

The Golden Grimoire itself receives narrative weight as the source of each transformation. Gems and ritual details support that premise without distracting from the changing rows.

Fantasy Magic Horror Mystery Book Gems Love

Features & Win Potential

Mystery Symbols transform after landing and may turn a complete row into the same paying symbol. Substitution Symbols then help connect those transformed positions into valid wins.

Sticky Wilds and Mystery behavior give Free Spins a persistent element. Once important positions remain in place, later spins depend on what those locations reveal next.

Free Spins Scatter Symbol Wild Symbol Cascading 5 Reels Mystery Symbols Low volatility Sticky Wilds Sub Symbols In Feature Low/Medium RTP range 96% RTP Mystery symbol Substitution Symbols 40 Paylines

Bonus & Free Spins

Free Spins preserve the Mystery Symbol positions and transform them on each new round. This makes the bonus less about adding unrelated mechanics and more about repeatedly using accumulated positions.

Spec sheet

Golden Grimoire at a glance.

Identity

Slot nameGolden Grimoire

StudioNetEnt

Released2/22/2019

Math

SlotRanker Score70

RTP96.44%

VolatilityLow volatility

Max win200×

Bet range$0.20 – $400.00

Player rating3.7 / 5 · 20 votes

Format

Reels5

Paylines40

Layout5x4

This game is searched most in United States, Argentina, and Austria.

Expected average based on this slot's 96.44% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$2.85

Cost per session$2.85

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 Golden Grimoire? 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: Low

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 (Low). The model is calibrated so the average return equals this slot's published RTP (96.44%), with wins capped at its top multiplier (200×).

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 Golden Grimoire

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 Golden Grimoire with other games

	Golden Grimoire Score 70This game	Skeleton Key Score 76	Occultum 81 Score 49	Monsterville Secrets Score 84	Shadow Treasure Score 82
Identity
Studio	NetEnt	IGT	Apollo Games	Ino Games	NowNow Gaming
Released	2/22/2019	12/17/2020	5/16/2020	10/22/2024	11/25/2024
Math
RTP	96.44%	96%	92%	96.04%	96.29%
Volatility	Low volatility	Medium volatility	Medium/High	Medium/High	Medium/High
Max win	200×	83,333×	1,620×	12,500×	12,000×
Format
Reels	5	5	4	5	5
Layout	5x4	5x3	4x3	5x4	5x5
Paylines	40	243	81	243	14
Min bet	0.2	0.1	0.1	0.2	0.1
Max bet	400	300	35	50	100
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	—	✓	✓
Scatter symbol	✓	✓	—	✓	—
Multiplier	—	✓	✓	✓	✓
Bonus game	—	—	—	—	—
Respins	—	—	—	—	✓

Every number is shown as a delta against Golden Grimoire.

Comparing against

Golden Grimoire

NetEnt

RTP

96.44%

Max win

200×

Score

+ Multiplier− Free Spins− Scatter

+ Multiplier+ Respins− Scatter

Explore More Games with Similar RTP

	Provider	RTP	Volatility	Max win	Score
Sword of Shoguns	Thunderkick	96.4%	High volatility	25,200×	88
Booty Bay	Push Gaming	96.41%	High volatility	20,000×	83
Fortunes of the Aztec	Pragmatic Play	96.42%	High volatility	10,000×	82
90's Mania Megaways	Blueprint Gaming	96.43%	High volatility	—	87
Golden Grimoire	NetEnt	96.44%	Low volatility	200×	70
Fireworks Megaways	Big Time Gaming	96.44%	High volatility	150,335×	88
Holy Hand Grenade	Print Studios	96.45%	High volatility	20,000×	85
Giza Infinity Reels	ReelPlay	96.45%	Medium volatility	10,000×	73
Dragon Fall	Blueprint Gaming	96.46%	Medium volatility	50,000×	88
Cash Lab Megaways	iSoftbet	96.47%	High volatility	20,000×	87
Midgard’s Fortune Megaways	GameArt	96.48%	—	15,000×	83

01What is the RTP of Golden Grimoire?

Golden Grimoire has a 96.44% RTP. Its catalog profile also records Low volatility, although certified configurations can vary between operators.

02What happens when a Mystery Symbol appears?

A Mystery Symbol transforms into another symbol and can convert an entire row when its result matches the row’s first position.

03What changes during the Free Spins round?

Mystery Symbol positions become sticky during Free Spins and transform again on later rounds, giving the same fixed locations repeated chances to contribute.

No player notes yet

Be the first to share your experience with this slot.