Endorphina

Crystal Skull

RARE Slots Video Slots History Horror Mystery Action & Adventure Ancient civilizations Animals Aztec Egypt Jungle Ancient

Play Crystal Skull slot by Endorphina for free in demo mode! Explore RTP, bonus rounds, and key features before playing for real.

Only 0.2% of slots combine Bonusgame: Pick Objects and Gamble.

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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

96.1%

return to player

Volatility

—

variance

Max win

—

top multiplier

Min bet

$0.01

per spin

Reels

25 lines

Player rating

4.8 ★

2 votes

DEMO Play free, no signup

Endorphina

4.8 / 5

2 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

Volatility8/10imputed

imputed medium (unknown) → 8.0/10

Win Potential—

no data

Features10/10

15 features → 10.0/10

Game Mechanics5.6/10

f=15 r=5 p=25 → 5.6/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility8/10

0.01–75 (×7500) → 8.0/10

Provider Reputation6.6/10

provider avg 6.6 → 6.6/10

Popularity6.7/10

synthetic proxy → 6.7/10

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 — Crystal Skull by Endorphina

https://slotranker.com/endorphina/crystal-skull#score

How to cite

Spec sheet

Crystal Skull at a glance.

Identity

Slot nameCrystal Skull

StudioEndorphina

Released11/22/2022

Math

SlotRanker Score79

RTP96.1%

Max win—

Bet range$0.01 – $75.00

Player rating4.8 / 5 · 2 votes

Format

Reels5

Paylines25

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$0.16

Cost per session$0.16

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 Crystal 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 (96.10%), 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 Crystal Skull with other games

	Crystal Skull Score 79This game	Ecuador Gold Score 83	Aztec Warrior Princess Score 68	Jenny Nevada and the Diamond Temple Score 67	Maya Quest Score 78
Identity
Studio	Endorphina	ELK Studios	Play'n Go	Rival Gaming	Nextspin
Released	11/22/2022	2/19/2019	5/10/2017	2/11/2025	8/10/2021
Math
RTP	96.1%	96.1%	96.69%	95.93%	96.84%
Volatility	—	High volatility	Medium volatility	—	Medium volatility
Max win	—	—	—	5,000×	37,500×
Format
Reels	5	6	5	5	5
Layout	5x3	6x4	5x3	5x3	5x3
Paylines	25	262144	20	20	20
Min bet	0.01	0.20	0.20	0.20	0.20
Max bet	75.00	100.00	25.00	20.00	300.00
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	—	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	✓	✓	—	✓	✓
Bonus game	✓	✓	✓	✓	—
Respins	—	—	—	—	—

Every number is shown as a delta against Crystal Skull.

Comparing against

Crystal Skull

Endorphina

RTP

96.1%

Max win

—

Score

Aztec Warrior Princess

+ Free Spins− Multiplier

Jenny Nevada and the Diamond Temple

+ Free Spins− Bonus Game

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