Endorphina games: observed play

92.6% of observed rounds returned nothing, give or take 0.09 points.

What we measured

What these numbers mean

Every figure on this page is counted from rounds that real players settled on 7 casinos, read from each operator's public bet feed. Nothing here comes from Endorphina or from the casinos' marketing, and nothing is estimated from a game's advertised return to player.

Across 305,279 rounds of 233 Endorphina games, 92.6% paid back nothing at all. The rest returned something, from a fraction of the stake up to the largest win we saw, 1284 times the bet. A high share of empty rounds is normal for high volatility slots, which pay rarely and big; it is not by itself a sign that a game is unfair.

Questions

Are Endorphina games fair?

Niekie does not certify fairness; that is the job of the testing labs a studio contracts. What we can show is how Endorphina games actually behaved: 305,279 rounds counted from casinos' public bet feeds, of which 92.6% returned nothing.

What is the RTP of Endorphina slots?

We do not publish a studio-wide RTP for Endorphina or any other studio. Pooling games with very different payout scales makes the average swing far more than the sample can support, so any single number would be misleading. We publish the share of rounds that return nothing instead, because that figure settles quickly and is true.

Where does this Endorphina data come from?

From settled rounds on 7 casinos that publish live bet feeds, collected continuously between 2026-07-30 and 2026-10-21. House games, distribution platforms and feeds that provably show only winning rounds are excluded.

We publish no return to player figure for Endorphina, or for any studio. The reason is arithmetic, not caution. Individual games, where the sample allows, are on the games page.

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