Harrys Derby slot: RTP and max win
Harrys Derby is a medium-volatility slot by cnbs on Stake Engine, released 17 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 10,000× the bet; from a base spin it lands about once every 1,000,000 spins. It has 2 bonus buys priced at 25× to 250× the bet; the best returns 96.70%, so each buy costs 0.83× the bet on average over the long run. It is the No. 3184 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 v2. "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% | 10,000× | 1 in 1,000,000 | 1 in 2.50 | 1 in 4.19 | 0.03× base | Simulate |
| Hot Tip | Boosted spin | 5.00× | 96.70% | 10,000× | 1 in 8,938 | 1 in 1.78 | 1 in 12 | 0.17× base | Simulate |
| Copper | Boosted spin | 10× | 96.70% | 213× | 1 in 141,432 | – | 1 in 3.47 | 0.33× base | Simulate |
| Silver | Bonus buy | 25× | 96.70% | 1,009× | 1 in 171,233 | – | 1 in 8.57 | 0.83× base | Simulate |
| Gold | Bonus buy | 250× | 96.70% | 10,000× | 1 in 230 | – | 1 in 4.38 | 8.25× base | Simulate |
Work out the cost of Harrys Derby 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 | |
|---|---|---|
| v2 | 96.700% | Active |
Frequently asked
What is the RTP of Harrys Derby?
Base spins return 96.70% of the amount wagered over the long run, from the published outcome table for version 2. All 2 of its bonus buys return 96.70%.
What is the max win in Harrys Derby and how likely is it?
The top payout is 10,000× the base bet. On a base spin it lands 1 in 1,000,000 spins. In the Silver buy (25×) 1,009× lands 1 in 171,233 buys.
Does Harrys Derby have a bonus buy, and what does it cost?
Yes, 2 buy modes. Silver: 25× the base bet, 96.70% RTP, an expected cost of 0.83× the base bet per buy. Gold: 250× the base bet, 96.70% RTP, an expected cost of 8.25× the base bet per buy.
Is Harrys Derby high or low volatility?
Medium. Its base-mode standard deviation is 17.1× 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.
Slots with similar math to Harrys Derby
Matched on volatility, max win, RTP and whether there's a bonus buy. Not on theme.
Wukong's WrathLucky Labs RTP96.70%Max win10,000×Volatility
WildbrewShavi RTP96.69%Max win10,000×Volatility
BrokeMan CrystalWidehole Studios RTP96.70%Max win10,000×Volatility
Borlesque Night 2Arcan Game RTP96.70%Max win10,000×Volatility
Hanta VirusBolly Studios RTP96.70%Max win10,000×Volatility
Swipe to LoveRiddleborn RTP96.70%Max win10,000×Volatility