World Rumble slot: RTP and max win
World Rumble is a medium-volatility slot by VOIDMOON on Stake Engine, released 1 Aug 2026. Its base game returns 96.40%, above the median Engine slot (96.02%) and higher than 64% of them. The top payout is 25,000× the bet, bigger than 81% of Engine slots. It has 3 bonus buys priced at 75× to 1,000× the bet; the best returns 96.40%, so each buy costs 2.70× the bet on average over the long run. It is the No. 6703 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 v21. "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× | 96.40% | 15,000× | 1 in 600,000 | 1 in 3.00 | 1 in 4.26 | 0.04× base | Simulate |
| Bonus World Chaos | Bonus buy | 75× | 96.40% | 15,000× | 1 in 149,986 | – | 1 in 2.92 | 2.70× base | Simulate |
| Bonus Mega Chaos | Bonus buy | 200× | 96.40% | 20,000× | 1 in 25,716 | – | 1 in 5.42 | 7.20× base | Simulate |
| Bonus Tournament | Bonus buy | 1,000× | 96.40% | 25,000× | 1 in 222 | 1 in 2.22 | 1 in 4.94 | 36.00× base | Simulate |
Work out the cost of World Rumble 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 | |
|---|---|---|
| v21 | 96.396% | Active |
Frequently asked
What is the RTP of World Rumble?
Base spins return 96.40% of the amount wagered over the long run, from the published outcome table for version 21. All 3 of its bonus buys return 96.40%.
What is the max win in World Rumble and how likely is it?
The top payout is 25,000× the base bet. On a base spin the top payout of 15,000× lands 1 in 600,000 spins. In the Bonus World Chaos buy (75×) 15,000× lands 1 in 149,986 buys.
Does World Rumble have a bonus buy, and what does it cost?
Yes, 3 buy modes. Bonus World Chaos: 75× the base bet, 96.40% RTP, an expected cost of 2.70× the base bet per buy. Bonus Mega Chaos: 200× the base bet, 96.40% RTP, an expected cost of 7.20× the base bet per buy. Bonus Tournament: 1,000× the base bet, 96.40% RTP, an expected cost of 36.00× the base bet per buy.
Is World Rumble high or low volatility?
Medium. Its base-mode standard deviation is 20.9× 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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