Grand Slam slot: RTP and max win
Grand Slam is a low-volatility slot by Slotrix on Stake Engine, released 15 Dec 2025. Its base game returns 96.00%, below the median Engine slot (96.02%). The top payout is 1,000× the bet; from a base spin it lands about once every 100,000 spins. It has 1 bonus buy priced at 200× the bet; the best returns 96.00%, so each buy costs 8.00× the bet on average over the long run. It is the No. 5128 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.
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 | 96.000% | Active |
Frequently asked
What is the RTP of Grand Slam?
Base spins return 96.00% of the amount wagered over the long run, from the published outcome table for version 1. Its bonus buy returns 96.00%.
What is the max win in Grand Slam and how likely is it?
The top payout is 1,000× the base bet. On a base spin it lands 1 in 100,000 spins. In the Bonus buy (200×) 1,000× lands 1 in 500 buys.
Does Grand Slam have a bonus buy, and what does it cost?
Yes, 1 buy mode. Bonus: 200× the base bet, 96.00% RTP, an expected cost of 8.00× the base bet per buy.
Is Grand Slam high or low volatility?
Low. Its base-mode standard deviation is 7.0× 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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