The Umbra Express slot: RTP and max win
The Umbra Express is a medium-volatility slot by Talore Labs on Stake Engine, released 1 Sep 2026. Its base game returns 96.50%, above the median Engine slot (96.02%) and higher than 66% of them. The top payout is 25,000× the bet, bigger than 81% of Engine slots; from a base spin it lands about once every 5,000,022 spins. It has 4 bonus buys priced at 100× to 500× the bet; the best returns 96.50%, so each buy costs 3.50× the bet on average over the long run. It is the No. 4790 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× | 96.50% | 25,000× | 1 in 5,000,022 | 1 in 2.85 | 1 in 55 | 0.04× base | Simulate |
| Timetable | Boosted spin | 2.00× | 96.50% | 25,000× | 1 in 2,500,003 | 1 in 2.94 | 1 in 46 | 0.07× base | Simulate |
| Final Stop | Bonus buy | 100× | 96.50% | 25,000× | 1 in 25,000 | – | 1 in 3.66 | 3.50× base | Simulate |
| First Class | Bonus buy | 300× | 96.50% | 25,000× | 1 in 5,556 | – | 1 in 4.13 | 10.50× base | Simulate |
| Mystery Route | Bonus buy | 400× | 96.50% | 25,000× | 1 in 3,125 | 1 in 2.00 | 1 in 3.22 | 14.00× base | Simulate |
| Midnight Run | Bonus buy | 500× | 96.50% | 25,000× | 1 in 2,500 | – | 1 in 3.85 | 17.50× base | Simulate |
Work out the cost of The Umbra Express 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 | 96.500% | Active |
Frequently asked
What is the RTP of The Umbra Express?
Base spins return 96.50% of the amount wagered over the long run, from the published outcome table for version 1. All 4 of its bonus buys return 96.50%.
What is the max win in The Umbra Express and how likely is it?
The top payout is 25,000× the base bet. On a base spin it lands 1 in 5,000,022 spins. In the Final Stop buy (100×) 25,000× lands 1 in 25,000 buys.
Does The Umbra Express have a bonus buy, and what does it cost?
Yes, 4 buy modes. Final Stop: 100× the base bet, 96.50% RTP, an expected cost of 3.50× the base bet per buy. First Class: 300× the base bet, 96.50% RTP, an expected cost of 10.50× the base bet per buy. Mystery Route: 400× the base bet, 96.50% RTP, an expected cost of 14.00× the base bet per buy. Midnight Run: 500× the base bet, 96.50% RTP, an expected cost of 17.50× the base bet per buy.
Is The Umbra Express high or low volatility?
Medium. Its base-mode standard deviation is 16.2× the bet, which puts it in the middle 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.
Slots with similar math to The Umbra Express
Matched on volatility, max win, RTP and whether there's a bonus buy. Not on theme.
ONE WAY CRUISEEpikx RTP96.50%Max win25,000×Volatility
Midnight RadioLiora Games RTP96.50%Max win25,000×Volatility
Bone BazaarLoki Empire RTP96.50%Max win25,000×Volatility
Pawn Ticket 77Maktub RTP96.50%Max win25,000×Volatility
Red SightShiftUP Studio RTP96.50%Max win25,000×Volatility
Whisker WraithsKeko Studios RTP96.50%Max win25,000×Volatility