Gates of the Underworld by OctoPlay: headline RTP 95.73%, max win x3 500.
An RTP of 95.73% means a house edge of 4.27% — the expected cost is 4.27 units per 100 staked over the long run, whatever a single session does.
The advertised ceiling is x3 500. Max win figures describe the tail of the distribution, not a realistic target: on most games with a ceiling this high the probability per spin is below one in a million.
Against our catalogue the number is below the median of 96.13%, higher than 23% of the games whose RTP we verified. That comparison matters more than the raw figure, because "96%" only sounds generous next to nothing.
Gates of the Underworld is one of 138 OctoPlay titles in our catalogue, a studio averaging 95.06% RTP across the games we could verify.
See the full OctoPlay game list and RTP breakdown.
This title is tagged Halloween. A theme is art direction, not maths — two games sharing every symbol can be priced differently.
Gates of the Underworld has a published RTP of 95.73%, a house edge of 4.27%. We have not yet found a casino serving it at a different RTP build.
Yes. Gates of the Underworld has a free demo with the same mathematics as the real-money version — the only thing that changes is that the balance is not yours. A demo cannot tell you the RTP build a particular casino serves.
Gates of the Underworld is a OctoPlay game, so the outcome is produced by the studio's certified RNG rather than by the casino, and it is not provably fair in the cryptographic sense — you cannot recompute a spin from a seed. What the casino does control is which RTP build it serves. That is the real variable, and it is measurable.