Hellcatraz

Q: What's the RTP of Hellcatraz?

Mixed Mode: 96.46%. Lockdown Mode: 96.30%. With bonus buy: 96.88%. Check the in-game 'i' menu to confirm.

Q: Mixed or Lockdown — which mode should I pick?

Mixed (96.46% RTP, 23.22% hit rate) is high volatility with longer, more comfortable sessions. Lockdown (96.30% RTP, 19.92% hit rate) is super-high volatility with progressive multipliers, aimed at chasing the big win. With a modest bankroll, Mixed is the safer pick.

9.3/10

Release May 2020· Updated October 2026

Cluster-pays slot from Relax Gaming (May 2020). Countdown mystery symbols + Mixed/Lockdown modes, max 51,840x. BetsRank score: 9.3/10.

RTP

96.46%

Volatility

High

Max Win

46 656x

Grid

6x6

Bonus Buy

Yes

Cluster pays cascadingCountdown mystery symbols (1-5)2 modes : Mixed / LockdownFree Spins (collect 2 000 keys)Bonus Buy 200x

9.3

BetsRank Verdict

Our read of the game, based on the data the studio publishes

Released on 5 May 2020, Hellcatraz is one of Relax Gaming's most innovative cluster-pays slots. Format 6x6 cluster pays, up to 46,656 ways, RTP 96.46% (Mixed Mode) / 96.30% (Lockdown Mode) / 96.88% with bonus buy, high volatility, max win 51,840x. Its unique signature mechanic is Countdown mystery symbols (numbered 1-5) that tick down with every winning cascade and reveal a symbol when they hit 0. Two game modes are available: Mixed (high volatility) and Lockdown (super-high volatility, progressive multipliers). Free Spins trigger by collecting 2,000 keys via the cascades. Bonus buy costs 200x the stake. Hit frequency ranges from 19.92% (Lockdown) to 23.22% (Mixed).

Strengths

+Unique Countdown mystery symbols mechanic
+Two game modes (Mixed / Lockdown)
+96.88% RTP with bonus buy
+46,656 ways cluster pays
+Decent 51,840x max win

To consider

−200x bonus buy price is steep next to Money Train 4's 100x
−Free Spins are hard to reach (collect 2,000 keys)
−High to super-high (Lockdown) volatility
−Dark prison theme is a niche fit

About Hellcatraz

Released on 5 May 2020, Hellcatraz is one of Relax Gaming's most innovative cluster-pays slots. Format 6x6 cluster pays, up to 46,656 ways, RTP 96.46% Mixed Mode / 96.30% Lockdown Mode / 96.88% with bonus buy, high volatility (super-high in Lockdown), max win 51,840x. Dark prison setting. Its unique signature mechanic: Countdown mystery symbols (numbered 1-5) that tick down with every winning cascade and reveal a symbol when they hit 0. Two selectable game modes: Mixed (high volatility, 23.22% hit rate) or Lockdown (super-high volatility, progressive multipliers, 19.92% hit rate). Free Spins trigger by collecting 2,000 keys through the cascades — a rare and lengthy grind. Bonus buy costs 200x the stake.

Key mechanics

▸6x6 cluster-pays format, 46,656 ways
▸Countdown mystery symbols (1-5)
▸Two modes: Mixed / Lockdown
▸Cascading wins
▸Free Spins (collect 2,000 keys)
▸200x stake bonus buy
▸96.88% RTP with bonus buy

💰 Bonus Buy: 200x stake

❓Hellcatraz FAQ

What's the RTP of Hellcatraz?▾

Mixed Mode: 96.

46%. Lockdown Mode: 96. 30%. With bonus buy: 96. 88%. Check the in-game 'i' menu to confirm.

Mixed or Lockdown — which mode should I pick?▾

Mixed (96.

46% RTP, 23. 22% hit rate) is high volatility with longer, more comfortable sessions. Lockdown (96. 30% RTP, 19. 92% hit rate) is super-high volatility with progressive multipliers, aimed at chasing the big win. With a modest bankroll, Mixed is the safer pick.

Is Hellcatraz available online?▾

Yes, at most top-rated crypto and anonymous online casinos that carry Relax Gaming.

What's the max win on Hellcatraz?▾

The theoretical max win is 51,840x the stake, reached by chaining large cluster cascades with Countdown mystery symbol payouts, particularly in Lockdown mode.

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Last updated: 10/22/2026

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Slot sheet last updated on October 22, 2026 · Sources: slotcatalog.com, official studio sites