Quick answer
Crystal Skull is a Endorphina slot (2022) with 93.77% RTP and medium–high volatility. It uses 25 paylines with wild symbols, bonus wheel and gamble feature. An official free demo is available. RTP can vary by casino.
On this page10 sections
Key specs
- RTP
- 93.77%
- 2.27 points below the median (96.04%)
- Volatility
- Medium–high4 of 6 on our volatility scale
- Grid
- 5×3
- Pays
- 25 paylines
- Released
- 2022
- Bet range
- $0.25–$75
Not published by the provider: max win, jackpot
Top-rated casinos (check the game is available)
We haven't confirmed which partner carries this game.
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Key terms
Every significant term is in the line above.
Full T&Cs apply. Please gamble responsibly.
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Key terms
Every significant term is in the line above.
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Key terms
- Cashback
- Cashback: 10% of net casino losses each week (Monday to Sunday), paid as cash with no wagering every Monday, up to $500 a week.
Full T&Cs apply. Please gamble responsibly.
Game availability varies by casino and country.
Themes:
Free demo Members
Try Crystal Skull with play money before deciding whether to play for real. Official Endorphina demos are free for GambGenius members.
How to play Crystal Skull (members only)
Wins are paid when matching symbols land on an active payline, usually left to right starting from the leftmost reel. Your total stake is spread across the lines, and each line win is the line bet multiplied by the symbol's paytable value.
Crystal Skull is played on a 5×3 grid with 25 paylines.
- Set your stake. Choose your total bet per spin between $0.25 and $75. Wins are paid as multiples of this stake.
- Check the paytable. Open the game's info screen to see what each symbol pays and the exact rules for this version.
- Spin. Each spin's result is decided by a certified random number generator, independent of previous spins.
- Optional bonus buy. Where permitted, pay a fixed price to start the bonus directly.
The full Crystal Skull guide: how winnings work, 5 features and 4 strategy tips
- Your stake plan: a $50 budget → about $0.20 a spin (medium–high volatility)
- What 93.77% RTP costs per $100 wagered: $6.23 on average
- 5 features explained: wild symbols, bonus wheel, gamble feature, bonus buy, multipliers
- Bonus-buy risk breakdown
- Stake plans for $20 to $250 budgets, checked against the $0.25 minimum bet
- 4 slots with the same style and a higher RTP (up to 97.66%)
- Strategy tips and a session planner for Crystal Skull
Free · no card · 18+ only
Never sold · export or delete any time · What do members get?
How winnings work (members only)
What 93.77% RTP costs per $100 wagered
Multipliers are applied to wins as they land; in many games several multipliers add together or multiply each other, which is where the largest wins come from.
What 93.77% RTP means
Expected return = stake × 93.77%
Over $100 of total bets, the long-run average loss is $6.23
RTP is a long-run average across millions of spins. Any single session can finish far above or below it, especially on a medium–high volatility game.
Features explained (members only)
5 features explained: wild symbols, bonus wheel, gamble feature, bonus buy and more
Wild symbols
Wilds substitute for regular paying symbols to help complete winning combinations. They do not normally replace scatter or bonus symbols.
Bonus wheel
A wheel feature that awards a prize, multiplier, jackpot or entry into another bonus round.
Gamble feature
After a win you can risk it on a double-or-nothing guess, such as the colour of a card. It does not improve the game's long-term return.
Bonus buy
Lets you pay a fixed multiple of your stake to enter the bonus feature straight away instead of waiting for it to trigger. It raises variance considerably and is not available in every country (it is banned in the UK).
Multipliers
Multipliers increase a win by a set factor, such as 2x or 10x. They can be attached to symbols, applied to a whole spin, or grow during a feature, and are a main driver of the biggest wins.
Strategy tips (members only)
- Size your stake to the volatility. Medium-to-high volatility means longer gaps between meaningful wins, with most of the return concentrated in features. Use smaller stakes relative to your budget. A simple rule: bring at least 250 spins' worth of budget, so a $50 budget suggests a stake of about $0.20.
3 more tips and a session planner
- Treat bonus buys as high-risk. Buying the feature concentrates your budget into a few large-variance rounds. Many results return less than the price paid. Read our bonus buy guide first.
- Bonus wagering: at 93.77% RTP, clearing $1,000 of wagering costs about $62.30 on average. Check the bonus terms, as some casinos exclude specific games. Run your numbers in the wagering calculator.
- Set limits before you spin. Decide your loss limit and session time in advance and stop when you reach either. No pattern or betting system changes the outcome of a spin.
More on this in slot RTP and volatility explained and bankroll management.
Does it fit your budget? (members only)
Stake plans for $20 to $250 budgets, checked against the $0.25 minimum bet
For medium–high volatility we suggest a budget of at least 250 spins. This is what that means for Crystal Skull (bets from $0.25 up to a maximum bet of $75).
| Budget | Stake a spin | Bet range | Average cost of 250 spins |
|---|---|---|---|
| $20 | $0.08 | Below the $0.25 minimum bet | $1.25 |
| $50 | $0.20 | Below the $0.25 minimum bet | $3.12 |
| $100 | $0.40 | Fits | $6.23 |
| $250 | $1 | Fits | $15.58 |
Averages only: a short session can end far above or below them. Set a loss limit before you play.
Same style, better RTP (members only)
4 slots with the same style and a higher RTP (up to 97.66%)
Slots with the same mechanic (paylines) and volatility (medium–high) as Crystal Skull, with a higher published RTP. Casinos can still run lower versions of any of them.
Roo Riches97.66% RTP · +3.89 pts
Ratinho Sortudo97.57% RTP · +3.8 pts
Fruit Million Halloween97.34% RTP · +3.57 pts
Dice Million97.34% RTP · +3.57 ptsQuestions
Frequently asked questions
Who makes Crystal Skull?
Crystal Skull is developed by Endorphina and was released in 2022.
What is the RTP of Crystal Skull?
The default RTP of Crystal Skull is 93.77%.
Is Crystal Skull high volatility?
Crystal Skull is rated medium–high volatility. Medium-to-high volatility means longer gaps between meaningful wins, with most of the return concentrated in features.
Can I play Crystal Skull for free?
Yes. GambGenius members can play the official Endorphina demo of Crystal Skull free on this page. It uses play money only, so demo wins can't be withdrawn, and it is for players aged 18 and over.
Does Crystal Skull have a bonus buy?
Yes. Crystal Skull includes a bonus buy option, although it is unavailable in some countries such as the UK.
Where this data comes from
- endorphina.com Provider
- endorphina.com Provider
Specs are as published by the provider. Casinos can run lower-RTP versions, so always check the game rules before you play.
Game artwork © Endorphina, shown to identify the game.
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