Hellcatraz — RTP, volatility and max win

Relax Gaming made Hellcatraz a pixel-art crime slot: cops, crooks and an island circled by sharks. Across 46,656 ways, mystery symbols reveal the same icon together, and collected energy pushes the game towards free spins.

Visually Hellcatraz uses pixel graphics in brown and violet, with police icons, water, sharks, hearts and stars. The 6×6 grid is unusually large and carries 46,656 ways, so every spin opens up a huge number of combinations at once. You can wager €0.20 at minimum, and the maximum of €20 is set fairly low. Relax Gaming released the game on May 5, 2020, and our data was last matched on June 17, 2026.

There are no fixed lines. Any row works: a symbol pays when it shows up on the first reel and then on each following neighbour. With six rows on each of the six reels, that adds up to 46,656 ways. Several matching symbols on one reel multiply the number of ways hit, which is why mid-value icons can pay noticeably when they stack up. Symbol values are listed in the in-game paytable.

Mystery symbols are the core of the game: they land face down and all turn into the same symbol at once. On a grid with 46,656 ways, a single reveal can fill a lot of ways in one go, and the wild plugs any remaining gaps.

Alongside that, Hellcatraz collects energy symbols. The energy builds up over your spins and pushes the game towards free spins, where the mystery mechanic delivers its biggest hits.

Impatient players can use the bonus buy, which starts the free spins straight away. It costs a multiple of your stake and is not enabled at every casino.

Because the bonus round of Hellcatraz can be bought outright, inferno slots with a bonus buy points to other titles that offer the same shortcut.

RTP 96.46%, higher than 85% of the 400 Inferno slots. Background: how RTP works on a slot. Volatility High, like 192 of the 399 Inferno slots. Background: what slot volatility means. Max win 51,840× (€1,036,800 at the highest stake). Background: what max win means on a slot. Hit frequency 19.92%: roughly one spin in 5 wins.

Hellcatraz returns 96.46%, and the high volatility is easy to feel in play: 19.92% of spins hit, roughly one spin in five, but the big amounts come almost entirely from mystery reveals during free spins.

A ceiling as high as 51,840× is exceptional. Paired with the low maximum bet, it shows that Relax Gaming built the game around rare, very large hits.

Since not every casino runs Hellcatraz at the same rate, titles like this one are flagged in the RTP comparison of inferno slots.

Because the max win of Hellcatraz ranks among the highest in the catalogue, the max win comparison sorts all titles by their cap.

Something like Hellcatraz? Try picks with high volatility as well as an almost equal RTP.