Oracle Labs

Skull Surge demo

Free play · no deposit · no sign-up

RTP
96.50%
Max win
50,000×
Ways to play
4
Max-win odds
1 in 677k

Skull Surge is a Oracle Labs slot on Stake Engine with 96.50% RTP and a 50,000× max win. Play the Skull Surge demo free above with play money — no deposit and no account needed. It has 4 ways to play, from the base game up to bone cascade at 220× your bet, and each one's exact odds are broken down below. For real money, Skull Surge is available at Stake and Stake US.

Every way to play

4 modes · tap one to explore its odds

Cheapest route to the 50,000× max: Ritual (2×) — about 1.4M× your bet staked per hit on average, vs 2.3M× on base game (1×).

Base game

Base game · 1× your bet per spin · A normal spin at 1× your bet.

RTP
96.50%
Max win
50,000×
In profit
6.9%
Pays nothing
79.2%

Odds explorer

Pick a payout and read the exact chance, straight from Engine's provably-fair outcome table.

Reading the outcome tables…

Demos use play money. Maths computed by circus.fyi from Engine's published provably-fair tables — every outcome a mode can produce and how often, nothing sampled.

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Skull Surge demo — questions

Can I play the Skull Surge demo for free?
Yes. The Skull Surge demo on circus.fyi runs the real game from Stake Engine with play money, so you can try every feature without a deposit or an account.
What is the RTP of Skull Surge?
Skull Surge has an RTP of 96.50%, which means it pays back that share of every amount staked over the long run.
What is the max win on Skull Surge?
The max win on Skull Surge is 50,000× your bet. The most likely way to land it is Ritual (2× per round), where it hits about 1 in 677,002 rounds.
Does Skull Surge have a bonus buy?
Yes — Skull Surge has 2 buy options: Cursed Souls at 60× your bet; Bone Cascade at 220× your bet.
How often does Skull Surge pay?
In the base game, 6.9% of spins pay back more than they cost and 79.2% pay nothing. These figures come from the full outcome table, not a simulation.
Who makes Skull Surge?
Skull Surge is made by Oracle Labs. It is published on Stake Engine, so its outcome tables are provably fair.
Where can I play Skull Surge for real money?
Skull Surge is available for real money at Stake and Stake US. Use the "Play at" button on this page to open it at the casino you prefer.