FILLWORD slot: RTP and max win
FILLWORD is a high-volatility slot by MVP on Stake Engine, released 30 Sep 2026. The top payout is 15,000× the bet; from a base spin it lands about once every 1,916,997 spins. It has 10 bonus buys priced at 100× to 500× the bet; the best returns 96.70%, so each buy costs 3.30× the bet on average over the long run. It is the No. 3915 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 v9. "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× | 96.70% | 15,000× | 1 in 1,916,997 | 1 in 2.88 | 1 in 7.67 | 0.03× base | |
| Base Es | Base spin | 1.00× | 96.70% | 15,000× | 1 in 1,916,721 | 1 in 2.88 | 1 in 7.67 | 0.03× base | |
| Base Fr | Base spin | 1.00× | 96.70% | 15,000× | 1 in 1,921,875 | 1 in 2.88 | 1 in 7.69 | 0.03× base | |
| Base Pt | Base spin | 1.00× | 96.70% | 15,000× | 1 in 1,920,827 | 1 in 2.88 | 1 in 7.68 | 0.03× base | |
| Base Social | Base spin | 1.00× | 96.70% | 15,000× | 1 in 1,922,359 | 1 in 2.88 | 1 in 7.69 | 0.03× base | |
| Vowels | Boosted spin | 3.00× | 96.70% | 15,000× | 1 in 567,391 | – | 1 in 5.67 | 0.10× base | Simulate |
| Vowels Es | Boosted spin | 3.00× | 96.70% | 15,000× | 1 in 568,120 | – | 1 in 5.68 | 0.10× base | Simulate |
| Vowels Fr | Boosted spin | 3.00× | 96.70% | 15,000× | 1 in 568,965 | – | 1 in 5.69 | 0.10× base | Simulate |
| Vowels Pt | Boosted spin | 3.00× | 96.70% | 15,000× | 1 in 568,765 | – | 1 in 5.69 | 0.10× base | Simulate |
| Vowels Social | Boosted spin | 3.00× | 96.70% | 15,000× | 1 in 570,196 | – | 1 in 5.70 | 0.10× base | Simulate |
| Bonus | Bonus buy | 100× | 96.70% | 15,000× | 1 in 8,852 | – | 1 in 5.76 | 3.30× base | Simulate |
| Bonus Es | Bonus buy | 100× | 96.70% | 15,000× | 1 in 8,822 | – | 1 in 5.74 | 3.30× base | Simulate |
| Bonus Fr | Bonus buy | 100× | 96.70% | 15,000× | 1 in 8,882 | – | 1 in 5.78 | 3.30× base | Simulate |
| Bonus Pt | Bonus buy | 100× | 96.70% | 15,000× | 1 in 8,820 | – | 1 in 5.74 | 3.30× base | Simulate |
| Bonus Social | Bonus buy | 100× | 96.70% | 15,000× | 1 in 8,846 | – | 1 in 5.75 | 3.30× base | Simulate |
| Bonus500 | Bonus buy | 500× | 96.70% | 15,000× | 1 in 1,159 | – | 1 in 5.57 | 16.50× base | Simulate |
| Bonus500 Es | Bonus buy | 500× | 96.70% | 15,000× | 1 in 1,155 | – | 1 in 5.56 | 16.50× base | Simulate |
| Bonus500 Fr | Bonus buy | 500× | 96.70% | 15,000× | 1 in 1,157 | – | 1 in 5.57 | 16.50× base | Simulate |
| Bonus500 Pt | Bonus buy | 500× | 96.70% | 15,000× | 1 in 1,155 | – | 1 in 5.55 | 16.50× base | Simulate |
| Bonus500 Social | Bonus buy | 500× | 96.70% | 15,000× | 1 in 1,155 | – | 1 in 5.55 | 16.50× base | Simulate |
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 | |
|---|---|---|
| v9 | 96.700% | Active |
Frequently asked
What is the RTP of FILLWORD?
Base spins return 96.70% of the amount wagered over the long run, from the published outcome table for version 9. All 10 of its bonus buys return 96.70%.
What is the max win in FILLWORD and how likely is it?
The top payout is 15,000× the base bet. On a base spin it lands 1 in 1,916,997 spins. In the Bonus Es buy (100×) 15,000× lands 1 in 8,822 buys.
Does FILLWORD have a bonus buy, and what does it cost?
Yes, 10 buy modes. Bonus: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Bonus Es: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Bonus Fr: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Bonus Pt: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Bonus Social: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Bonus500: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy. Bonus500 Es: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy. Bonus500 Fr: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy. Bonus500 Pt: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy. Bonus500 Social: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy.
Is FILLWORD high or low volatility?
High. Its base-mode standard deviation is 32.2× 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.