Thunder Bird slot: RTP and max win
Thunder Bird is a high-volatility slot by 1 More Spin on Stake Engine, released 24 Jun 2026. Its base game returns 96.00%, below the median Engine slot (96.02%). The top payout is 10,000× the bet; from a base spin it lands about once every 163,069 spins. It has 4 bonus buys priced at 40× to 300× the bet; the best returns 96.00%, so each buy costs 1.60× the bet on average over the long run. It is the No. 4473 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 v6. "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% | 10,000× | 1 in 163,069 | 1 in 1.54 | 1 in 4.84 | 0.04× base | Simulate |
| Ante | Boosted spin | 5.00× | 96.00% | 10,000× | 1 in 16,909 | 1 in 1.50 | 1 in 75 | 0.20× base | Simulate |
| Guaranteed Mas | Bonus buy | 40× | 96.00% | 10,000× | 1 in 1,785 | – | 1 in 2.01 | 1.60× base | Simulate |
| Bonus | Bonus buy | 100× | 96.00% | 10,000× | 1 in 1,055 | – | 1 in 12 | 4.00× base | Simulate |
| Guaranteed Has | Bonus buy | 100× | 96.00% | 10,000× | 1 in 11,884 | – | 1 in 1.92 | 4.00× base | Simulate |
| Superbonus | Bonus buy | 300× | 96.00% | 10,000× | 1 in 288 | – | 1 in 6.64 | 12.00× base | Simulate |
Work out the cost of Thunder Bird 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 | |
|---|---|---|
| v6 | 96.000% | Active |
Frequently asked
What is the RTP of Thunder Bird?
Base spins return 96.00% of the amount wagered over the long run, from the published outcome table for version 6. All 4 of its bonus buys return 96.00%.
What is the max win in Thunder Bird and how likely is it?
The top payout is 10,000× the base bet. On a base spin it lands 1 in 163,069 spins. In the Guaranteed Mas buy (40×) 10,000× lands 1 in 1,785 buys.
Does Thunder Bird have a bonus buy, and what does it cost?
Yes, 4 buy modes. Guaranteed Mas: 40× the base bet, 96.00% RTP, an expected cost of 1.60× the base bet per buy. Bonus: 100× the base bet, 96.00% RTP, an expected cost of 4.00× the base bet per buy. Guaranteed Has: 100× the base bet, 96.00% RTP, an expected cost of 4.00× the base bet per buy. Superbonus: 300× the base bet, 96.00% RTP, an expected cost of 12.00× the base bet per buy.
Is Thunder Bird high or low volatility?
High. Its base-mode standard deviation is 37.8× 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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