Mariachi Coins by SmartSoft Gaming: headline RTP 97.62%, max win x2 500.
An RTP of 97.62% means a house edge of 2.38% — the expected cost is 2.38 units per 100 staked over the long run, whatever a single session does.
The advertised ceiling is x2 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 above the median of 96.13%, higher than 99% of the games whose RTP we verified. That comparison matters more than the raw figure, because "96%" only sounds generous next to nothing.
Mariachi Coins has a published RTP of 97.62%, a house edge of 2.38%. We have not yet found a casino serving it at a different RTP build.
Yes. Mariachi Coins 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.
Mariachi Coins is a SmartSoft Gaming 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.