Endorphina

Thunder Crown

Royal storm slot linking expanding Wilds with Hold and Win

Thunder Crown uses Guaranteed Wild In Free Spins; 99.1% of the games we track do not.

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

96.05%

return to player

Volatility

Medium volatility

variance

Max win

2,400×

top multiplier

Min bet

$0.50

per spin

Reels

50 lines

Player rating

4.5 ★

10 votes

DEMO Play free, no signup

Endorphina

Embed on your site

4.5 / 5

10 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 96.05% → 9.0/10

Volatility8/10

medium → 8.0/10

Win Potential6.8/10

x2400.00 (2400×) → 6.8/10

Features10/10

17 features → 10.0/10

Game Mechanics7.6/10

f=17 r=5 p=50 → 7.6/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility6/10

0.5–100 (×200) → 6.0/10

Provider Reputation6.6/10

provider avg 6.6 → 6.6/10

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: 73 — Thunder Crown by Endorphina

https://slotranker.com/endorphina/thunder-crown#score

How to cite

Slot Summary

A storm-charged royal crown controls the most important substitutions in Thunder Crown, turning Endorphina's Crown and Royal subject into a functional part of play. Its Expanding Symbols work across the middle reels, while Free Spins guarantee Wild support and the Thunder Hold feature shifts attention to collected spheres and Fixed Jackpots. The 96.05% RTP and Medium volatility place these events within a less extreme profile than the feature count might suggest.

How It Plays

Regular play uses 50 fixed paylines, with the Crown supplying the main change to ordinary symbol matching. When it lands on an eligible reel, it expands through that reel.

Token appearances create a second route away from the normal line loop. A qualifying event opens the Thunder Hold grid, where Respins replace standard reel evaluation.

Theme & Atmosphere

Crown and Royal themes are recast through a thunderstorm rather than a palace setting. The central crown acts as both the royal emblem and the source of the game's electrical effects.

This treatment gives a familiar royal subject a sharper rhythm: calm line play is interrupted by lightning-linked Wild activity, Token events, and a separate charged bonus field.

Crown Royal

Features & Win Potential

Expanding Symbols make the Crown Wild occupy a full eligible reel, while Sticky Symbols and Respins define the separate Hold and Win sequence once it begins.

Fixed Jackpots are associated with the completed columns in that bonus field. Random multiplier values on collected spheres supply the individual awards before the locked symbols are totaled.

Free Spins Multiplier Scatter Symbol Wild Symbol Respins Bonus Game Additional Free Spins Expanding Symbols Bonus symbols Hold and Win Guaranteed Wild in Free Spins Random multiplier Fixed Jackpots Risk/Gamble (Double) game Reelset Changing Additive symbol Sticky Symbols

Bonus & Free Spins

Scatter Symbol combinations activate Free Spins, where a Guaranteed Wild in Free Spins appears on every turn. The Wild can expand and support several of the 50 paylines at once.

The Hold and Win Bonus Game uses collected sphere symbols, Sticky Symbols, and Respins. Filling qualifying columns awards Fixed Jackpots, giving the round a visible completion target.

Spec sheet

Thunder Crown at a glance.

Identity

Slot nameThunder Crown

StudioEndorphina

Released8/17/2025

Math

SlotRanker Score73

RTP96.05%

VolatilityMedium volatility

Max win2,400×

Bet range$0.50 – $100.00

Player rating4.5 / 5 · 10 votes

Format

Reels5

Paylines50

Layout5x3

Features

Themes

Expected average based on this slot's 96.05% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$7.90

Cost per session$7.90

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 Thunder Crown? 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: Medium

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 (96.05%), with wins capped at its top multiplier (2,400×).

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 Thunder Crown

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Compare Thunder Crown with other games

	Thunder Crown Score 73This game	Ultra Cluster Kingdom Score 86	Bonus Epic Crown Dice Score 83	Gold Pigger 2 Royal Snouts Score 85	Wild Piggy Bank Score 82
Identity
Studio	Endorphina	GameArt	Fazi Interactive	Fantasma Games	Popiplay
Released	8/17/2025	9/24/2024	—	12/9/2024	2/20/2025
Math
RTP	96.05%	96.22%	96.53%	96.09%	97.11%
Volatility	Medium volatility	High volatility	High volatility	Medium volatility	Medium/High
Max win	2,400×	5,000×	20,108×	13,712×	10,100×
Format
Reels	5	8	5	6	5
Layout	5x3	8x8	5x3	6x4	5x3
Paylines	50	Cluster Pays	10	4096	15
Min bet	0.5	0.2	0.01	0.2	—
Max bet	100	200	10	3000	25
Features
Progressive	—	—	—	—	—
Wild symbol	✓	—	✓	✓	✓
Free spins	✓	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	✓	—	✓	✓	—
Bonus game	✓	✓	✓	✓	—
Respins	✓	—	—	✓	✓

Every number is shown as a delta against Thunder Crown.

Comparing against

Thunder Crown

Endorphina

RTP

96.05%

Max win

2,400×

Score

Ultra Cluster Kingdom

− Wild− Multiplier− Respins

Bonus Epic Crown Dice

Gold Pigger 2 Royal Snouts

− Multiplier− Bonus Game

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