Moonbase Mayhem slot: RTP and max win
Moonbase Mayhem is a high-volatility slot by Gaming Vault on Stake Engine, released 28 Oct 2026. Its base game returns 96.01%, below the median Engine slot (96.02%). The top payout is 15,000× the bet, bigger than 50% of Engine slots. It has 4 bonus buys priced at 20× to 220× the bet; the best returns 96.05%, so each buy costs 3.95× the bet on average over the long run. It is the No. 3845 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 | |
|---|---|---|---|---|---|---|---|---|---|
| Normal | Base spin | 1.00× | 96.01% | 5,000× | 1 in 19,237 | 1 in 2.76 | 1 in 11 | 0.04× base | Simulate |
| Signal Scanner | Boosted spin | 5.00× | 96.08% | 15,000× | 1 in 250,420 | 1 in 2.27 | 1 in 10 | 0.20× base | Simulate |
| Armed Probe | Bonus buy | 20× | 96.03% | 15,000× | 1 in 125,001 | 1 in 2.27 | 1 in 10 | 0.79× base | Simulate |
| Moon Spins | Bonus buy | 40× | 96.01% | 15,000× | 1 in 33,334 | 1 in 1.02 | 1 in 3.66 | 1.60× base | Simulate |
| Orbit Spins | Bonus buy | 100× | 96.05% | 15,000× | 1 in 25,001 | 1 in 1.02 | 1 in 3.65 | 3.95× base | Simulate |
| Warp Spins | Bonus buy | 220× | 96.02% | 15,000× | 1 in 33,335 | every round | 1 in 7.64 | 8.75× base | Simulate |
Work out the cost of Moonbase Mayhem 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 | 96.012% | Active |
Frequently asked
What is the RTP of Moonbase Mayhem?
Base spins return 96.01% of the amount wagered over the long run, from the published outcome table for version 3. Its bonus buys return between 96.01% and 96.05%.
What is the max win in Moonbase Mayhem and how likely is it?
The top payout is 15,000× the base bet. On a base spin the top payout of 5,000× lands 1 in 19,237 spins. In the Orbit Spins buy (100×) 15,000× lands 1 in 25,001 buys.
Does Moonbase Mayhem have a bonus buy, and what does it cost?
Yes, 4 buy modes. Armed Probe: 20× the base bet, 96.03% RTP, an expected cost of 0.79× the base bet per buy. Moon Spins: 40× the base bet, 96.01% RTP, an expected cost of 1.60× the base bet per buy. Orbit Spins: 100× the base bet, 96.05% RTP, an expected cost of 3.95× the base bet per buy. Warp Spins: 220× the base bet, 96.02% RTP, an expected cost of 8.75× the base bet per buy.
Is Moonbase Mayhem high or low volatility?
High. Its base-mode standard deviation is 43.0× 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 Moonbase Mayhem
Matched on volatility, max win, RTP and whether there's a bonus buy. Not on theme.
Toybox Riot4phantom RTP96.01%Max win15,000×Volatility
Sweet ShowdownShockwave Gaming RTP96.00%Max win15,000×Volatility
MineFishingMindGames RTP96.00%Max win15,000×Volatility
Yeti WildsZAVRUNE GAMING RTP96.07%Max win15,000×Volatility
DisclosureGrunge RTP96.00%Max win15,000×Volatility
Wild AlchemistPulse Gaming RTP96.00%Max win15,000×Volatility