Howlin Hollow slot: RTP and max win
Howlin Hollow is a high-volatility slot by Killer Games on Stake Engine, released 22 Oct 2026. Its base game returns 96.30%, above the median Engine slot (96.02%) and higher than 61% of them. The top payout is 100,000× the bet, bigger than 100% of Engine slots; from a base spin it lands about once every 9,173,520 spins. It has 4 bonus buys priced at 25× to 400× the bet; the best returns 96.30%, so each buy costs 0.93× the bet on average over the long run. It is the No. 385 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 v1. "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× | 96.30% | 100,000× | 1 in 9,173,520 | 1 in 2.73 | 1 in 10 | 0.04× base | Simulate |
| Night Watch | Boosted spin | 3.00× | 96.30% | 100,000× | 1 in 2,979,254 | 1 in 2.70 | 1 in 19 | 0.11× base | Simulate |
| Bat Swarm | Bonus buy | 25× | 96.30% | 100,000× | 1 in 328,155 | 1 in 1.01 | 1 in 7.59 | 0.93× base | Simulate |
| Dead Of Night | Bonus buy | 100× | 96.30% | 100,000× | 1 in 153,702 | every round | 1 in 5.20 | 3.70× base | Simulate |
| The Seance | Bonus buy | 150× | 96.30% | 100,000× | 1 in 32,833 | 1 in 2.52 | 1 in 8.76 | 5.55× base | Simulate |
| Howling Moon | Bonus buy | 400× | 96.30% | 100,000× | 1 in 10,860 | every round | 1 in 5.50 | 14.80× base | Simulate |
Work out the cost of Howlin Hollow 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 | |
|---|---|---|
| v1 | 96.300% | Active |
Frequently asked
What is the RTP of Howlin Hollow?
Base spins return 96.30% of the amount wagered over the long run, from the published outcome table for version 1. All 4 of its bonus buys return 96.30%.
What is the max win in Howlin Hollow and how likely is it?
The top payout is 100,000× the base bet. On a base spin it lands 1 in 9,173,520 spins. In the Bat Swarm buy (25×) 100,000× lands 1 in 328,155 buys.
Does Howlin Hollow have a bonus buy, and what does it cost?
Yes, 4 buy modes. Bat Swarm: 25× the base bet, 96.30% RTP, an expected cost of 0.93× the base bet per buy. Dead Of Night: 100× the base bet, 96.30% RTP, an expected cost of 3.70× the base bet per buy. The Seance: 150× the base bet, 96.30% RTP, an expected cost of 5.55× the base bet per buy. Howling Moon: 400× the base bet, 96.30% RTP, an expected cost of 14.80× the base bet per buy.
Is Howlin Hollow high or low volatility?
High. Its base-mode standard deviation is 55.0× 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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