WELDING WILLI slot: RTP and max win
WELDING WILLI is a medium-volatility slot by BAREKNUCKLE on Stake Engine, released 23 Aug 2026. The top payout is 25,000× the bet; from a base spin it lands about once every 8,000,512 spins. It has 9 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. 1123 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 v2. "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% | 25,000× | 1 in 8,000,512 | 1 in 3.38 | 1 in 9.93 | 0.04× base | Simulate |
| Ante Scatter | Boosted spin | 1.50× | 96.00% | 25,000× | 1 in 5,332,992 | 1 in 3.12 | 1 in 10 | 0.06× base | Simulate |
| Ante Wild | Boosted spin | 1.50× | 96.00% | 25,000× | 1 in 5,332,992 | 1 in 2.63 | 1 in 9.02 | 0.06× base | Simulate |
| Ante Both | Boosted spin | 2.00× | 96.00% | 25,000× | 1 in 3,999,872 | 1 in 2.92 | 1 in 9.47 | 0.08× base | Simulate |
| Bonus1 | Bonus buy | 100× | 96.00% | 25,000× | 1 in 80,000 | – | 1 in 3.22 | 4.00× base | Simulate |
| Bonus1x | Bonus buy | 100× | 96.00% | 25,000× | 1 in 40,000 | – | 1 in 3.32 | 4.00× base | Simulate |
| Bonus1m | Bonus buy | 200× | 96.00% | 25,000× | 1 in 6,000 | – | 1 in 3.32 | 8.00× base | Simulate |
| Bonus2 | Bonus buy | 500× | 96.00% | 25,000× | 1 in 16,000 | – | 1 in 3.15 | 20.00× base | Simulate |
| Bonus2x | Bonus buy | 500× | 96.00% | 25,000× | 1 in 8,000 | – | 1 in 3.30 | 20.00× base | Simulate |
| Bonus2m | Bonus buy | 600× | 96.00% | 25,000× | 1 in 4,000 | – | 1 in 3.32 | 24.00× base | Simulate |
| Bonus3 | Bonus buy | 1,000× | 96.00% | 25,000× | 1 in 8,000 | – | 1 in 2.98 | 40.00× base | Simulate |
| Bonus3m | Bonus buy | 1,000× | 96.00% | 25,000× | 1 in 2,500 | – | 1 in 2.85 | 40.00× base | Simulate |
| Bonus3x | Bonus buy | 1,000× | 96.00% | 25,000× | 1 in 4,000 | – | 1 in 3.07 | 40.00× base | Simulate |
Work out the cost of WELDING WILLI 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 | |
|---|---|---|
| v2 | 96.000% | Active |
Frequently asked
What is the RTP of WELDING WILLI?
Base spins return 96.00% of the amount wagered over the long run, from the published outcome table for version 2. All 9 of its bonus buys return 96.00%.
What is the max win in WELDING WILLI and how likely is it?
The top payout is 25,000× the base bet. On a base spin it lands 1 in 8,000,512 spins. In the Bonus1 buy (100×) 25,000× lands 1 in 80,000 buys.
Does WELDING WILLI have a bonus buy, and what does it cost?
Yes, 9 buy modes. Bonus1: 100× the base bet, 96.00% RTP, an expected cost of 4.00× the base bet per buy. Bonus1x: 100× the base bet, 96.00% RTP, an expected cost of 4.00× the base bet per buy. Bonus1m: 200× the base bet, 96.00% RTP, an expected cost of 8.00× the base bet per buy. Bonus2: 500× the base bet, 96.00% RTP, an expected cost of 20.00× the base bet per buy. Bonus2x: 500× the base bet, 96.00% RTP, an expected cost of 20.00× the base bet per buy. Bonus2m: 600× the base bet, 96.00% RTP, an expected cost of 24.00× the base bet per buy. Bonus3: 1,000× the base bet, 96.00% RTP, an expected cost of 40.00× the base bet per buy. Bonus3m: 1,000× the base bet, 96.00% RTP, an expected cost of 40.00× the base bet per buy. Bonus3x: 1,000× the base bet, 96.00% RTP, an expected cost of 40.00× the base bet per buy.
Is WELDING WILLI high or low volatility?
Medium. Its base-mode standard deviation is 14.6× 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.