Soul Frontier slot: RTP and max win
Soul Frontier is a high-volatility slot by Monolith on Stake Engine, released 25 Sep 2026. Its base game returns 96.70%, above the median Engine slot (96.02%) and higher than 86% of them. The top payout is 100,000× the bet, bigger than 100% of Engine slots; from a base spin it lands about once every 8,000,000 spins. It has 6 bonus buys priced at 25× to 1,000× 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. 415 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 v1. "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% | 100,000× | 1 in 8,000,000 | 1 in 5.14 | 1 in 16 | 0.03× base | Simulate |
| Ante | Boosted spin | 2.00× | 96.70% | 100,000× | 1 in 5,376,344 | 1 in 5.25 | 1 in 19 | 0.07× base | Simulate |
| Superante | Bonus buy | 25× | 96.70% | 100,000× | 1 in 287,770 | 1 in 5.36 | 1 in 35 | 0.83× base | Simulate |
| Bonus | Bonus buy | 100× | 96.70% | 100,000× | 1 in 40,000 | – | 1 in 3.67 | 3.30× base | Simulate |
| Super | Bonus buy | 250× | 96.70% | 100,000× | 1 in 16,000 | – | 1 in 3.67 | 8.25× base | Simulate |
| Mystery | Bonus buy | 400× | 96.70% | 100,000× | 1 in 5,000 | 1 in 2.50 | 1 in 4.57 | 13.20× base | Simulate |
| Epic | Bonus buy | 500× | 96.70% | 100,000× | 1 in 8,000 | – | 1 in 3.95 | 16.50× base | Simulate |
| Special | Bonus buy | 1,000× | 96.70% | 100,000× | 1 in 1,500 | – | 1 in 4.01 | 33.00× base | Simulate |
Work out the cost of Soul Frontier 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 | |
|---|---|---|
| v1 | 96.700% | Active |
Frequently asked
What is the RTP of Soul Frontier?
Base spins return 96.70% of the amount wagered over the long run, from the published outcome table for version 1. All 6 of its bonus buys return 96.70%.
What is the max win in Soul Frontier and how likely is it?
The top payout is 100,000× the base bet. On a base spin it lands 1 in 8,000,000 spins. In the Superante buy (25×) 100,000× lands 1 in 287,770 buys.
Does Soul Frontier have a bonus buy, and what does it cost?
Yes, 6 buy modes. Superante: 25× the base bet, 96.70% RTP, an expected cost of 0.83× the base bet per buy. Bonus: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Super: 250× the base bet, 96.70% RTP, an expected cost of 8.25× the base bet per buy. Mystery: 400× the base bet, 96.70% RTP, an expected cost of 13.20× the base bet per buy. Epic: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy. Special: 1,000× the base bet, 96.70% RTP, an expected cost of 33.00× the base bet per buy.
Is Soul Frontier high or low volatility?
High. Its base-mode standard deviation is 46.6× 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.
Slots with similar math to Soul Frontier
Matched on volatility, max win, RTP and whether there's a bonus buy. Not on theme.
Iron JawXposed Studios RTP96.70%Max win100,000×Volatility
Glow BelowChatty Games RTP96.70%Max win100,000×Volatility
Math.SINNeuron Stimpak RTP96.70%Max win100,000×Volatility
Apeollo 21Paco 21 RTP96.70%Max win100,000×Volatility
LegionTerminal Games RTP96.70%Max win100,000×Volatility
Book of Torii 100KMiyake Studios RTP96.70%Max win100,000×Volatility