Railyard Runaway slot: RTP and max win
Railyard Runaway is a high-volatility slot by Kek Studios on Stake Engine, released 3 Sep 2026. The top payout is 19,999× the bet; from a base spin it lands about once every 1,243,504 spins. It has 15 bonus buys priced at 100× to 1,000× 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. 6374 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% | 19,999× | 1 in 1,243,504 | 1 in 1.72 | 1 in 7.43 | 0.03× base | Simulate |
| Base High | Base spin | 1.00× | 96.70% | 19,999× | 1 in 305,200 | 1 in 2.48 | 1 in 14 | 0.03× base | Simulate |
| Base Low | Base spin | 1.00× | 96.70% | 19,999× | 1 in 1,827,553 | 1 in 1.25 | 1 in 7.17 | 0.03× base | Simulate |
| Bonus | Bonus buy | 100× | 96.70% | 19,999× | 1 in 12,178 | – | 1 in 4.94 | 3.30× base | Simulate |
| Bonus High | Bonus buy | 100× | 96.70% | 19,999× | 1 in 4,877 | – | 1 in 6.93 | 3.30× base | Simulate |
| Bonus Low | Bonus buy | 100× | 96.70% | 19,999× | 1 in 160,830 | – | 1 in 3.13 | 3.30× base | Simulate |
| Super Bonus | Bonus buy | 250× | 96.70% | 19,999× | 1 in 8,735 | – | 1 in 4.69 | 8.25× base | Simulate |
| Super Bonus High | Bonus buy | 250× | 96.70% | 19,999× | 1 in 2,868 | – | 1 in 4.94 | 8.25× base | Simulate |
| Super Bonus Low | Bonus buy | 250× | 96.70% | 19,999× | 1 in 33,271 | – | 1 in 3.49 | 8.25× base | Simulate |
| Super Run | Bonus buy | 300× | 96.70% | 19,999× | 1 in 7,692 | 1 in 1.19 | 1 in 5.85 | 9.90× base | Simulate |
| Super Run High | Bonus buy | 300× | 96.70% | 19,999× | 1 in 588 | 1 in 1.61 | 1 in 6.93 | 9.90× base | Simulate |
| Super Run Low | Bonus buy | 300× | 96.70% | 19,999× | 1 in 20,000 | 1 in 1.08 | 1 in 5.32 | 9.90× base | Simulate |
| Epic Bonus | Bonus buy | 500× | 96.70% | 19,999× | 1 in 3,018 | – | 1 in 3.69 | 16.50× base | Simulate |
| Epic Bonus High | Bonus buy | 500× | 96.70% | 19,999× | 1 in 2,226 | – | 1 in 4.20 | 16.50× base | Simulate |
| Epic Bonus Low | Bonus buy | 500× | 96.70% | 19,999× | 1 in 10,117 | – | 1 in 3.48 | 16.50× base | Simulate |
| Grand Run | Bonus buy | 1,000× | 96.70% | 19,999× | 1 in 833 | 1 in 1.43 | 1 in 6.64 | 33.00× base | Simulate |
| Grand Run High | Bonus buy | 1,000× | 96.70% | 19,999× | 1 in 526 | 1 in 2.22 | 1 in 5.86 | 33.00× base | Simulate |
| Grand Run Low | Bonus buy | 1,000× | 96.70% | 19,999× | 1 in 1,250 | 1 in 1.22 | 1 in 6.68 | 33.00× base | Simulate |
Work out the cost of Railyard Runaway 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 Railyard Runaway?
Base spins return 96.70% of the amount wagered over the long run, from the published outcome table for version 3. All 15 of its bonus buys return 96.70%.
What is the max win in Railyard Runaway and how likely is it?
The top payout is 19,999× the base bet. On a base spin it lands 1 in 1,243,504 spins. In the Bonus buy (100×) 19,999× lands 1 in 12,178 buys.
Does Railyard Runaway have a bonus buy, and what does it cost?
Yes, 15 buy modes. Bonus: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Bonus High: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Bonus Low: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Super Bonus: 250× the base bet, 96.70% RTP, an expected cost of 8.25× the base bet per buy. Super Bonus High: 250× the base bet, 96.70% RTP, an expected cost of 8.25× the base bet per buy. Super Bonus Low: 250× the base bet, 96.70% RTP, an expected cost of 8.25× the base bet per buy. Super Run: 300× the base bet, 96.70% RTP, an expected cost of 9.90× the base bet per buy. Super Run High: 300× the base bet, 96.70% RTP, an expected cost of 9.90× the base bet per buy. Super Run Low: 300× the base bet, 96.70% RTP, an expected cost of 9.90× the base bet per buy. Epic Bonus: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy. Epic Bonus High: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy. Epic Bonus Low: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy. Grand Run: 1,000× the base bet, 96.70% RTP, an expected cost of 33.00× the base bet per buy. Grand Run High: 1,000× the base bet, 96.70% RTP, an expected cost of 33.00× the base bet per buy. Grand Run Low: 1,000× the base bet, 96.70% RTP, an expected cost of 33.00× the base bet per buy.
Is Railyard Runaway high or low volatility?
High. Its base-mode standard deviation is 28.9× the bet, which puts it in the highest 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.