Mammoth Melt slot: RTP and max win
Mammoth Melt is a medium-volatility slot by Midnight Gaming on Stake Engine, released 19 Sep 2026. Its base game returns 96.00%, below the median Engine slot (96.02%). The top payout is 15,000× the bet, bigger than 50% of Engine slots; from a base spin it lands about once every 2,777,778 spins. It has 4 bonus buys priced at 100× to 1,000× the bet; the best returns 96.00%, so each buy costs 4.00× the bet on average over the long run. It is the No. 3794 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× | 96.00% | 15,000× | 1 in 2,777,778 | 1 in 2.48 | 1 in 15 | 0.04× base | Simulate |
| Ante | Boosted spin | 2.00× | 96.00% | 15,000× | 1 in 1,388,889 | 1 in 2.46 | 1 in 13 | 0.08× base | Simulate |
| Thaw Out | Bonus buy | 100× | 96.00% | 15,000× | 1 in 16,667 | 1 in 1.02 | 1 in 4.06 | 4.00× base | Simulate |
| Deep Thaw | Bonus buy | 300× | 96.00% | 15,000× | 1 in 16,667 | 1 in 1.02 | 1 in 3.81 | 12.00× base | Simulate |
| Heatwave | Bonus buy | 500× | 96.00% | 15,000× | 1 in 16,667 | 1 in 1.02 | 1 in 4.08 | 20.00× base | Simulate |
| Last Sun | Bonus buy | 1,000× | 96.00% | 15,000× | 1 in 16 | 1 in 16 | 1 in 16 | 40.00× base | Simulate |
Work out the cost of Mammoth Melt 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 | 96.000% | Active |
Frequently asked
What is the RTP of Mammoth Melt?
Base spins return 96.00% of the amount wagered over the long run, from the published outcome table for version 3. All 4 of its bonus buys return 96.00%.
What is the max win in Mammoth Melt and how likely is it?
The top payout is 15,000× the base bet. On a base spin it lands 1 in 2,777,778 spins. In the Thaw Out buy (100×) 15,000× lands 1 in 16,667 buys.
Does Mammoth Melt have a bonus buy, and what does it cost?
Yes, 4 buy modes. Thaw Out: 100× the base bet, 96.00% RTP, an expected cost of 4.00× the base bet per buy. Deep Thaw: 300× the base bet, 96.00% RTP, an expected cost of 12.00× the base bet per buy. Heatwave: 500× the base bet, 96.00% RTP, an expected cost of 20.00× the base bet per buy. Last Sun: 1,000× the base bet, 96.00% RTP, an expected cost of 40.00× the base bet per buy.
Is Mammoth Melt high or low volatility?
Medium. Its base-mode standard deviation is 22.5× the bet, which puts it in the middle 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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