STACKED UP slot: RTP and max win
STACKED UP is a low-volatility slot by Quickstrike on Stake Engine, released 23 Dec 2025. Its base game returns 97.55%, above the median Engine slot (96.02%) and higher than 99% of them. The top payout is 98× the bet; from a base spin it lands about once every 100 spins. It is the No. 761 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 | |
|---|---|---|---|---|---|---|---|---|---|
| Extreme | Base spin | 1.00× | 97.55% | 98× | 1 in 100 | 1 in 100 | 1 in 100 | 0.02× base | |
| Insane | Base spin | 1.00× | 97.97% | 9.80× | 1 in 10 | 1 in 10 | 1 in 10 | 0.02× base | Simulate |
| Normal | Base spin | 1.00× | 98.00% | 2.18× | 1 in 2.22 | 1 in 2.22 | 1 in 2.22 | 0.02× base | Simulate |
| Risky | Base spin | 1.00× | 97.86% | 3.92× | 1 in 4.01 | 1 in 4.01 | 1 in 4.01 | 0.02× base | Simulate |
| Safe | Base spin | 1.00× | 97.76% | 1.63× | 1 in 1.67 | 1 in 1.67 | 1 in 1.67 | 0.02× 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 | 97.547% | Active |
Frequently asked
What is the RTP of STACKED UP?
Base spins return 97.55% of the amount wagered over the long run, from the published outcome table for version 9. Across its 5 modes RTP ranges from 97.55% to 98.00%.
What is the max win in STACKED UP and how likely is it?
The top payout is 98× the base bet. On a base spin it lands 1 in 100 spins.
Does STACKED UP have a bonus buy?
No. None of its published modes costs 20× the base bet or more.
Is STACKED UP high or low volatility?
Low. Its base-mode standard deviation is 1.7× 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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