Cards of Athena Double Double Bonus by Switch Studios: headline RTP 98.98%, High volatility, max win x800.
An RTP of 98.98% means a house edge of 1.02% — the expected cost is 1.02 units per 100 staked over the long run, whatever a single session does.
Cards of Athena Double Double Bonus is a high volatility game: the return arrives in rare, large payouts, so long dry spells are normal rather than a malfunction. Size stakes for the drought, not the average.
The advertised ceiling is x800. 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 100% of the games whose RTP we verified. That comparison matters more than the raw figure, because "96%" only sounds generous next to nothing.
Cards of Athena Double Double Bonus has a published RTP of 98.98%, a house edge of 1.02%. We have not yet found a casino serving it at a different RTP build.
Yes. Cards of Athena Double Double Bonus 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.
Cards of Athena Double Double Bonus is a Switch Studios 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.