Day Zero Outbreak slot: RTP and max win
Day Zero Outbreak is a high-volatility slot by Donut Gaming on Stake Engine, released 23 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 25,000× the bet, bigger than 81% of Engine slots; from a base spin it lands about once every 5,000,000 spins. It has 1 bonus buy priced at 500× the bet; the best returns 96.70%, so each buy costs 17× the bet on average over the long run. It is the No. 21 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 v9. "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% | 25,000× | 1 in 5,000,000 | 1 in 25 | 1 in 49 | 0.03× base | Simulate |
| Bonus Chance Two | Boosted spin | 1.50× | 96.70% | 25,000× | 1 in 3,333,334 | 1 in 24 | 1 in 48 | 0.05× base | Simulate |
| Bonus Chance Three | Boosted spin | 2.00× | 96.70% | 25,000× | 1 in 2,500,000 | 1 in 23 | 1 in 42 | 0.07× base | Simulate |
| Bonus Chance Five | Boosted spin | 3.00× | 96.70% | 25,000× | 1 in 1,666,667 | 1 in 18 | 1 in 29 | 0.10× base | Simulate |
| Berserk Spin | Bonus buy | 500× | 96.70% | 25,000× | 1 in 833 | 1 in 3.53 | 1 in 5.94 | 16.50× base | Simulate |
Work out the cost of Day Zero Outbreak 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 | |
|---|---|---|
| v9 | 96.700% | Active |
Frequently asked
What is the RTP of Day Zero Outbreak?
Base spins return 96.70% of the amount wagered over the long run, from the published outcome table for version 9. Its bonus buy returns 96.70%.
What is the max win in Day Zero Outbreak and how likely is it?
The top payout is 25,000× the base bet. On a base spin it lands 1 in 5,000,000 spins. In the Berserk Spin buy (500×) 25,000× lands 1 in 833 buys.
Does Day Zero Outbreak have a bonus buy, and what does it cost?
Yes, 1 buy mode. Berserk Spin: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy.
Is Day Zero Outbreak high or low volatility?
High. Its base-mode standard deviation is 27.7× 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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