Bubble Rush slot: RTP and max win
Bubble Rush is a low-volatility slot by 3RD on Stake Engine, released 11 Jun 2026. Its base game returns 96.00%, below the median Engine slot (96.02%). The top payout is 5,000× the bet. It has 2 bonus buys priced at 100× to 250× 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. 4791 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% | 750× | 1 in 11,504,942 | 1 in 3.44 | 1 in 15 | 0.04× base | Simulate |
| Bubble Charge | Boosted spin | 2.00× | 96.00% | 1,000× | 1 in 12,640,414 | 1 in 3.44 | 1 in 13 | 0.08× base | Simulate |
| Pearl Boost | Boosted spin | 4.00× | 96.00% | 1,100× | 1 in 943,967 | 1 in 3.44 | 1 in 7.49 | 0.16× base | Simulate |
| Reef Bonus | Bonus buy | 100× | 96.00% | 1,800× | 1 in 381,394 | – | 1 in 3.85 | 4.00× base | Simulate |
| Abyss Bonus | Bonus buy | 250× | 96.00% | 5,000× | 1 in 40,000 | – | 1 in 4.64 | 10.00× base | Simulate |
Work out the cost of Bubble Rush 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 Bubble Rush?
Base spins return 96.00% of the amount wagered over the long run, from the published outcome table for version 3. All 2 of its bonus buys return 96.00%.
What is the max win in Bubble Rush and how likely is it?
The top payout is 5,000× the base bet. On a base spin the top payout of 750× lands 1 in 11,504,942 spins. In the Reef Bonus buy (100×) 1,800× lands 1 in 381,394 buys.
Does Bubble Rush have a bonus buy, and what does it cost?
Yes, 2 buy modes. Reef Bonus: 100× the base bet, 96.00% RTP, an expected cost of 4.00× the base bet per buy. Abyss Bonus: 250× the base bet, 96.00% RTP, an expected cost of 10.00× the base bet per buy.
Is Bubble Rush high or low volatility?
Low. Its base-mode standard deviation is 6.9× the bet, which puts it in the lowest 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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