Oni Blade slot: RTP and max win
Oni Blade is a high-volatility slot by NGF Studios on Stake Engine, released 1 Nov 2026. Its base game returns 96.70%, above the median Engine slot (96.02%) and higher than 86% of them. The top payout is 50,000× the bet, bigger than 97% of Engine slots; from a base spin it lands about once every 9,999,950 spins. It has 6 bonus buys priced at 100× to 2,000× 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. 1220 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 v17. "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% | 50,000× | 1 in 9,999,950 | 1 in 4.89 | 1 in 20 | 0.03× base | Simulate |
| Blood Pact | Boosted spin | 3.00× | 96.70% | 50,000× | 1 in 3,999,992 | 1 in 4.54 | 1 in 24 | 0.10× base | Simulate |
| Blood Harvest | Bonus buy | 100× | 96.70% | 50,000× | 1 in 400,000 | – | 1 in 4.71 | 3.30× base | Simulate |
| Mystery | Bonus buy | 100× | 96.70% | 50,000× | 1 in 200,000 | 1 in 2.50 | 1 in 3.85 | 3.30× base | Simulate |
| Onis Awakening | Bonus buy | 200× | 96.70% | 50,000× | 1 in 100,000 | – | 1 in 4.82 | 6.60× base | Simulate |
| Soul Collector | Bonus buy | 400× | 96.70% | 50,000× | 1 in 80,000 | – | 1 in 3.74 | 13.20× base | Simulate |
| Onis Rage | Bonus buy | 1,000× | 96.70% | 50,000× | 1 in 1,574 | – | 1 in 4.20 | 33.00× base | Simulate |
| Onis Judgement | Bonus buy | 2,000× | 96.70% | 50,000× | 1 in 34 | 1 in 11 | 1 in 11 | 66.00× base | Simulate |
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 | |
|---|---|---|
| v17 | 96.700% | Active |
Frequently asked
What is the RTP of Oni Blade?
Base spins return 96.70% of the amount wagered over the long run, from the published outcome table for version 17. All 6 of its bonus buys return 96.70%.
What is the max win in Oni Blade and how likely is it?
The top payout is 50,000× the base bet. On a base spin it lands 1 in 9,999,950 spins. In the Blood Harvest buy (100×) 50,000× lands 1 in 400,000 buys.
Does Oni Blade have a bonus buy, and what does it cost?
Yes, 6 buy modes. Blood Harvest: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Mystery: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Onis Awakening: 200× the base bet, 96.70% RTP, an expected cost of 6.60× the base bet per buy. Soul Collector: 400× the base bet, 96.70% RTP, an expected cost of 13.20× the base bet per buy. Onis Rage: 1,000× the base bet, 96.70% RTP, an expected cost of 33.00× the base bet per buy. Onis Judgement: 2,000× the base bet, 96.70% RTP, an expected cost of 66.00× the base bet per buy.
Is Oni Blade high or low volatility?
High. Its base-mode standard deviation is 40.5× 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.
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