Midnight Auction slot: RTP and max win
Midnight Auction is a high-volatility slot by xFroggy on Stake Engine, released 21 Oct 2026. Its base game returns 96.50%, above the median Engine slot (96.02%) and higher than 66% 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 651,294,089 spins. It has 6 bonus buys priced at 100× to 1,000× the bet; the best returns 96.50%, so each buy costs 3.50× the bet on average over the long run. It is the No. 3484 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 v22. "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× | 96.50% | 50,000× | 1 in 651,294,089 | 1 in 5.24 | 1 in 5.24 | 0.04× base | Simulate |
| Ante | Boosted spin | 3.00× | 96.50% | 50,000× | 1 in 99,786,858 | 1 in 3.83 | 1 in 11 | 0.11× base | Simulate |
| Super Ante | Boosted spin | 10× | 96.50% | 50,000× | 1 in 56,580,799 | 1 in 2.64 | 1 in 11 | 0.35× base | Simulate |
| Standard Auction Entry | Bonus buy | 100× | 96.50% | 50,000× | 1 in 1,000,026 | 1 in 1.01 | 1 in 14 | 3.50× base | Simulate |
| Bigger Auction Entry | Bonus buy | 200× | 96.50% | 50,000× | 1 in 500,002 | 1 in 1.01 | 1 in 11 | 7.00× base | Simulate |
| Single Bid Entry | Bonus buy | 250× | 96.50% | 50,000× | 1 in 60,661,786 | 1 in 1.82 | 1 in 5.17 | 8.75× base | Simulate |
| Hard Auction Entry | Bonus buy | 400× | 96.50% | 50,000× | 1 in 250,000 | 1 in 1.01 | 1 in 4.16 | 14.00× base | Simulate |
| Mystery Auction Entry | Bonus buy | 500× | 96.50% | 50,000× | 1 in 200,000 | 1 in 1.01 | 1 in 3.39 | 17.50× base | Simulate |
| White Glove Entry | Bonus buy | 1,000× | 96.50% | 50,000× | 1 in 52 | 1 in 52 | 1 in 52 | 35.00× base | Simulate |
Work out the cost of Midnight Auction 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 | |
|---|---|---|
| v22 | 96.500% | Active |
Frequently asked
What is the RTP of Midnight Auction?
Base spins return 96.50% of the amount wagered over the long run, from the published outcome table for version 22. All 6 of its bonus buys return 96.50%.
What is the max win in Midnight Auction and how likely is it?
The top payout is 50,000× the base bet. On a base spin it lands 1 in 651,294,089 spins. In the Standard Auction Entry buy (100×) 50,000× lands 1 in 1,000,026 buys.
Does Midnight Auction have a bonus buy, and what does it cost?
Yes, 6 buy modes. Standard Auction Entry: 100× the base bet, 96.50% RTP, an expected cost of 3.50× the base bet per buy. Bigger Auction Entry: 200× the base bet, 96.50% RTP, an expected cost of 7.00× the base bet per buy. Single Bid Entry: 250× the base bet, 96.50% RTP, an expected cost of 8.75× the base bet per buy. Hard Auction Entry: 400× the base bet, 96.50% RTP, an expected cost of 14.00× the base bet per buy. Mystery Auction Entry: 500× the base bet, 96.50% RTP, an expected cost of 17.50× the base bet per buy. White Glove Entry: 1,000× the base bet, 96.50% RTP, an expected cost of 35.00× the base bet per buy.
Is Midnight Auction high or low volatility?
High. Its base-mode standard deviation is 33.9× 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.
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