Methodology
Where our data comes from, how RTP & volatility are defined, and their limits.
Sources
Game attributes — RTP, volatility, reel layout, maximum win, mechanics and release year — are compiled from game studios' own published specifications, official game information screens, and public provider documentation. Where a studio publishes a figure, we record that figure.
What RTP means here
“RTP” (return to player) is the theoretical long-run percentage of total wagers a game returns, averaged across millions of spins. We record the studio's headline published RTP. Two important caveats:
- Many titles ship in multiple RTP configurations, and operators may deploy a lower one. The number here is the published reference, not a guarantee of the build you might encounter elsewhere.
- RTP says nothing about a single session. Over any real number of spins, variance dominates — you can lose far more, or occasionally win. Our per-slot expected-loss estimator models the average, and labels it as such.
Volatility
Volatility (low / medium / high) reflects the trade-off between how often a game pays and how large those wins tend to be. It is a categorical summary of the studio's stated variance and payout distribution, not a precise statistic.
Freshness & corrections
The dataset is refreshed periodically. Figures can change when studios update games. If you spot an inaccuracy, tell us via contact and we'll review it against the source.
Independence
We take no payment from operators or studios to list, rank or describe any game. Rankings such as “Best RTP” are ordered purely by the recorded data.
