Mad Scientist slot: RTP and max win
Mad Scientist is a medium-volatility slot by HC PROD on Stake Engine, released 14 Oct 2026. Its base game returns 96.70%, above the median Engine slot (96.02%) and higher than 86% of them. The top payout is 15,000× the bet, bigger than 50% of Engine slots; from a base spin it lands about once every 7,500,049 spins. It has 3 bonus buys priced at 100× to 500× the bet; the best returns 96.70%, so each buy costs 3.30× the bet on average over the long run. It is the No. 2494 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 v3. "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× | 96.70% | 15,000× | 1 in 7,500,049 | 1 in 2.96 | 1 in 83 | 0.03× base | Simulate |
| Bonus Hunt | Boosted spin | 3.00× | 96.70% | 15,000× | 1 in 2,500,005 | 1 in 2.64 | 1 in 20 | 0.10× base | Simulate |
| Bonus Hunt Premium | Boosted spin | 10× | 96.70% | 15,000× | 1 in 750,001 | 1 in 2.41 | 1 in 12 | 0.33× base | Simulate |
| Live Circuit Bonus | Boosted spin | 15× | 96.70% | 15,000× | 1 in 5,000,044 | 1 in 1.60 | 1 in 17 | 0.50× base | Simulate |
| Experiment Bonus | Bonus buy | 100× | 96.70% | 15,000× | 1 in 200,000 | every round | 1 in 7.09 | 3.30× base | Simulate |
| Overcharge Bounty | Bonus buy | 250× | 96.70% | 15,000× | 1 in 25,000 | every round | 1 in 4.81 | 8.25× base | Simulate |
| Meltdown Bonus | Bonus buy | 500× | 96.70% | 15,000× | 1 in 50,000 | every round | 1 in 3.79 | 16.50× base | Simulate |
Work out the cost of Mad Scientist 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 | |
|---|---|---|
| v3 | 96.700% | Active |
Frequently asked
What is the RTP of Mad Scientist?
Base spins return 96.70% of the amount wagered over the long run, from the published outcome table for version 3. All 3 of its bonus buys return 96.70%.
What is the max win in Mad Scientist and how likely is it?
The top payout is 15,000× the base bet. On a base spin it lands 1 in 7,500,049 spins. In the Experiment Bonus buy (100×) 15,000× lands 1 in 200,000 buys.
Does Mad Scientist have a bonus buy, and what does it cost?
Yes, 3 buy modes. Experiment Bonus: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Overcharge Bounty: 250× the base bet, 96.70% RTP, an expected cost of 8.25× the base bet per buy. Meltdown Bonus: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy.
Is Mad Scientist high or low volatility?
Medium. Its base-mode standard deviation is 15.2× 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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