Bonus Keno slot: RTP and max win

By Virtual Gold Studios. Released 2 Dec 2025, math version 17.

Low volatilityNo. 381 most played this month

Bonus Keno is a low-volatility slot by Virtual Gold Studios on Stake Engine, released 2 Dec 2025. Its base game returns 97.23%, above the median Engine slot (96.02%) and higher than 99% of them. The top payout is 4,020× the bet. It has 1 bonus buy priced at 100× the bet; the best returns 97.24%, so each buy costs 2.76× the bet on average over the long run. It is the No. 381 most played Engine slot over the last 30 days.

Base RTP

97.23%

catalogue figure 97.234%

Max win

4,020×

of the base bet

Max win, base spins

1 in 5,000,000

2,457× top payout per spin

Base spin pays nothing

78.1%

of spins

Players, last 30 days

731

$876K wagered (Engine Insights)

The 4,020× max win can't be reached from base spins in the published math. Base spins top out at 2,457×.

Every mode, side by side

Costs are multiples of the base bet. Odds come from the published outcome table for v17. "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×	97.23%	2,457×	1 in 5,000,000	1 in 4.55	1 in 4.55	0.03× base	Simulate
Bonus	Bonus buy	100×	97.24%	4,020×	1 in 500,000	every round	1 in 3.32	2.76× base	Simulate

Work out the cost of Bonus Keno 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
v17	97.234%	Active

Frequently asked

What is the RTP of Bonus Keno?

Base spins return 97.23% of the amount wagered over the long run, from the published outcome table for version 17. Its bonus buy returns 97.24%.

What is the max win in Bonus Keno and how likely is it?

The top payout is 4,020× the base bet. On a base spin the top payout of 2,457× lands 1 in 5,000,000 spins. In the Bonus buy (100×) 4,020× lands 1 in 500,000 buys.

Does Bonus Keno have a bonus buy, and what does it cost?

Yes, 1 buy mode. Bonus: 100× the base bet, 97.24% RTP, an expected cost of 2.76× the base bet per buy.

Is Bonus Keno high or low volatility?

Low. Its base-mode standard deviation is 9.2× 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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