Steampunker slot: RTP and max win
Steampunker is a medium-volatility slot by Venture Studios on Stake Engine, released 10 Sep 2026. Its base game returns 96.50%, above the median Engine slot (96.02%) and higher than 66% of them. The top payout is 10,000× the bet; from a base spin it lands about once every 10,000,000 spins. It has 7 bonus buys priced at 30× to 1,000× the bet; the best returns 96.50%, so each buy costs 1.05× the bet on average over the long run. It is the No. 4889 most played Engine slot over the last 30 days.
Every mode, side by side
Costs are multiples of the base bet. Odds come from the published outcome table for v4. "Returns the cost" counts rounds that pay back at least what the mode cost. Expected cost is cost × (1 − RTP): the average amount lost per round over the long run.
| Mode | Type | Cost | RTP | Max win | Max win odds | Pays anything | Returns the cost | Expected cost per round | |
|---|---|---|---|---|---|---|---|---|---|
| Base | Base spin | 1.00× | 96.50% | 10,000× | 1 in 10,000,000 | 1 in 3.63 | 1 in 8.80 | 0.04× base | Simulate |
| Ante | Boosted spin | 1.25× | 96.50% | 10,000× | 1 in 10,000,000 | 1 in 3.06 | 1 in 8.31 | 0.04× base | Simulate |
| Guaranteed Wild Column | Boosted spin | 5.00× | 96.50% | 10,000× | 1 in 10,000,000 | – | 1 in 3.54 | 0.18× base | Simulate |
| Guaranteed Random Multi | Bonus buy | 30× | 96.50% | 10,000× | 1 in 10,000,000 | – | 1 in 5.15 | 1.05× base | Simulate |
| Guaranteed Wild Row | Bonus buy | 70× | 96.50% | 10,000× | 1 in 10,000,000 | – | 1 in 2.77 | 2.45× base | Simulate |
| Bonus | Bonus buy | 100× | 96.50% | 10,000× | 1 in 10,000,000 | every round | 1 in 3.13 | 3.50× base | Simulate |
| Super Bonus | Bonus buy | 200× | 96.50% | 10,000× | 1 in 10,000,000 | every round | 1 in 2.91 | 7.00× base | Simulate |
| Guaranteed Replace Low Symbols | Bonus buy | 370× | 96.50% | 10,000× | 1 in 10,000,000 | – | 1 in 2.81 | 12.95× base | Simulate |
| Mystery | Bonus buy | 500× | 96.50% | 10,000× | 1 in 12,500,000 | 1 in 1.25 | 1 in 4.11 | 17.50× base | Simulate |
| Epic | Bonus buy | 1,000× | 96.50% | 10,000× | 1 in 10,000,000 | 1 in 1.01 | 1 in 3.65 | 35.00× base | Simulate |
Work out the cost of Steampunker bonus buys at your bet size
Version history
Base-mode RTP per published math version. Older versions stay public in the fairness API, so changes can be checked.
| Version | Base RTP | |
|---|---|---|
| v4 | 96.500% | Active |
Frequently asked
What is the RTP of Steampunker?
Base spins return 96.50% of the amount wagered over the long run, from the published outcome table for version 4. All 7 of its bonus buys return 96.50%.
What is the max win in Steampunker and how likely is it?
The top payout is 10,000× the base bet. On a base spin it lands 1 in 10,000,000 spins. In the Guaranteed Random Multi buy (30×) 10,000× lands 1 in 10,000,000 buys.
Does Steampunker have a bonus buy, and what does it cost?
Yes, 7 buy modes. Guaranteed Random Multi: 30× the base bet, 96.50% RTP, an expected cost of 1.05× the base bet per buy. Guaranteed Wild Row: 70× the base bet, 96.50% RTP, an expected cost of 2.45× the base bet per buy. Bonus: 100× the base bet, 96.50% RTP, an expected cost of 3.50× the base bet per buy. Super Bonus: 200× the base bet, 96.50% RTP, an expected cost of 7.00× the base bet per buy. Guaranteed Replace Low Symbols: 370× the base bet, 96.50% RTP, an expected cost of 12.95× the base bet per buy. Mystery: 500× the base bet, 96.50% RTP, an expected cost of 17.50× the base bet per buy. Epic: 1,000× the base bet, 96.50% RTP, an expected cost of 35.00× the base bet per buy.
Is Steampunker high or low volatility?
Medium. Its base-mode standard deviation is 15.8× the bet, which puts it in the middle third of Engine games. What volatility means.
Can I check that a result was fair?
Yes. Engine games use provably fair seeds. Once your server seed is revealed you can replay any round against the published outcome table. See how to verify a result.
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