Underworld Unboxing slot: RTP and max win
Underworld Unboxing is a low-volatility slot by Bacon Bits on Stake Engine, released 28 Feb 2026. Its base game returns 97.00%, above the median Engine slot (96.02%) and higher than 97% of them. The top payout is 10,000× the bet; from a base spin it lands about once every 3,367,179 spins. It is the No. 6847 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 v18. "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× | 97.00% | 10,000× | 1 in 3,367,179 | – | 1 in 54 | 0.03× base |
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 | |
|---|---|---|
| v18 | 97.000% | Active |
Frequently asked
What is the RTP of Underworld Unboxing?
Base spins return 97.00% of the amount wagered over the long run, from the published outcome table for version 18. The game has a single mode.
What is the max win in Underworld Unboxing and how likely is it?
The top payout is 10,000× the base bet. On a base spin it lands 1 in 3,367,179 spins.
Does Underworld Unboxing have a bonus buy?
No. None of its published modes costs 20× the base bet or more.
Is Underworld Unboxing high or low volatility?
Low. Its base-mode standard deviation is 11.9× 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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