Hellcatraz Slot Review

4.6/5
Based on our expert’s review. Reviewed by
Relax Gaming Slots
Review by
Chris Taylor
Updated: 09/10/2023
Review by
Chris Taylor
Updated: 09/10/2023

A prison drama that combines retro, 8-bit video game visuals with some explosive slots play is what you’ll find in a trip to the Hellcatraz slot. Created by Relax Gaming, this extremely high variance jail-themed slot is played using cascading reels where successive cascades can reveal special mystery symbols. Collect keys to unlock the free spins feature where mystery symbols are revealed without having to land any cascades. Did we want to bust out of this virtual Alcatraz? Find out in our detailed Hellcatraz review.

Max Win
51,843.3 x bet
Play
T&Cs Apply

18+ new players only. Minimum deposit: £20. Maximum £100 bonus. Max bet with an active bonus: £2. Wagering requirement 100% match bonus: 30 times sum of deposit + bonus. Max redeemable from welcome bonus: £500. 100 Free Spins are given out 20 per day on Book of Dead for 5 days in a row, log in each day is required. Max Free Spins winnings: £100. Winnings from Free Spins are credited as bonus money with a wagering requirement of 45 times. Free Spins expire after 3 days. Some games may not be played with a bonus. Games may contribute differently when wagering a bonus. Play Responsibly! www.begambleaware.org. #ad

Name
Hellcatraz
Provider
Relax Gaming
Type of Slot
Video Slot
Theme
Jail
Reels
6
Paylines
46,656
Stakes Range
10p to £25
Bonus Features
Yes (4)
Free Spins/Multiplier
5-Unlimited/1x
Max Win
51,843.3 x
RTP
96.46%
Volatility
Very High (5/5)

Hellcatraz Demo

18plus uk-gambling-commission online-slot-co-uk-logo agechecked-verification-provider
T&Cs Apply 18+ new players only. Minimum deposit: £20. Maximum £100 bonus. Max bet with an active bonus: £2. Wagering requirement 100% match bonus: 30 times sum of deposit + bonus. Max redeemable from welcome bonus: £500. 100 Free Spins are given out 20 per day on Book of Dead for 5 days in a row, log in each day is required. Max Free Spins winnings: £100. Winnings from Free Spins are credited as bonus money with a wagering requirement of 45 times. Free Spins expire after 3 days. Some games may not be played with a bonus. Games may contribute differently when wagering a bonus. Play Responsibly! www.begambleaware.org. #ad
18plus uk-gambling-commission online-slot-co-uk-logo agechecked-verification-provider
T&Cs Apply 18+ new players only. Minimum deposit: £20. Maximum £100 bonus. Max bet with an active bonus: £2. Wagering requirement 100% match bonus: 30 times sum of deposit + bonus. Max redeemable from welcome bonus: £500. 100 Free Spins are given out 20 per day on Book of Dead for 5 days in a row, log in each day is required. Max Free Spins winnings: £100. Winnings from Free Spins are credited as bonus money with a wagering requirement of 45 times. Free Spins expire after 3 days. Some games may not be played with a bonus. Games may contribute differently when wagering a bonus. Play Responsibly! www.begambleaware.org. #ad

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18+. New customers. Opt-in required. 20 Bonus Spins on “Sahara Riches Cash Collect” at 10p per spin and 100% Deposit Bonus up to £100 on first deposit (payment method and play restrictions apply). Min. deposit £10. 30x wagering for Bonus Spins and Deposit Bonus (game weighting applies). Max. £5/spin or £0.50/line. 30 days expiry. Please gamble responsibly • www.begambleaware.org #ad

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Hellcatraz Slot RTP, Details & Wager Limits

Reels/Paylines: 6 + 46,656 paylines

Stakes Range: 10p to £25 per spin

Max Win: 51,843.3 x stake per spin

RTP: 96.46%

The Hellcatraz slot is played using a 6×6 grid. Winning combinations are formed by landing matching symbols on adjoining reels, starting from reel 1. There are 46,656 ways to win. And no, it’s not a Megaways slot.

You can play Hellcatraz at stake levels that start at just 10p per spin. This rises to a maximum of £25 per spin for the Harry Grout-style Mr Bigs of the world.

The RTP is a reasonable 96.46%. This rises to an even better 96.83% if you opt to buy the feature. The Hellcatraz volatility is exceedingly high. This is a super high variance slot. We’re in 5 out of 5 territory on the volatility stakes. You can expect some lengthy spells where your jail escape plans come to nothing.

The max win is a whopping 51,843.3 x your total stake. The chance of winning the top prize increases in the Super Free Spins feature. The hit frequency is 19.92% meaning just 1 in 5 spins will result in a winning combination.

Hellcatraz Theme – block, retro visuals look superb

Theme: Jail

High Value Symbol: Policeman

Compatibility: Mobile, Tablet, Desktop

hellcatraz-slot-base-game

Hellcatraz has the feel of an old-school video game. The pixelated imagery is excellent. With the Golden Gate bridge, the San Francisco skyline and the famous Alcatraz Island prison in the background, the front of the screen is guarded by a pair of police boats.

The visuals are great if you’re a fan of retro gaming like me. I really enjoyed the whole setup, and the retro music is a fantastic addition, albeit slightly repetitive. It all works very nicely.

On the reel grid, you’ll see lower value diamond, star, heart and clover symbols. More rewarding are the handcuffs, prison officer’s badge, shark, prisoner and policeman. The policeman is the most rewarding symbol, paying 0.6, 1, 1.6 or 2 x your stake for 3, 4, 5 or 6 in combination.

Symbol Payout/Info
hellcatraz-slot-diamond-symbolDiamond 3, 4, 5 or 6 = 0.1, 0.2, 0.3 or 0.4 x stake
hellcatraz-slot-clover-symbolClover 3, 4, 5 or 6 = 0.1, 0.2, 0.3 or 0.4 x stake
hellcatraz-slot-heart-symbolHeart 3, 4, 5 or 6 = 0.1, 0.2, 0.3 or 0.4 x stake
hellcatraz-slot-star-symbolStar 3, 4, 5 or 6 = 0.1, 0.2, 0.3 or 0.4 x stake
hellcatraz-slot-handcuffs-symbolHandcuffs 3, 4, 5 or 6 = 0.2, 0.3, 0.4 or 0.6 x stake
hellcatraz-slot-badge-symbolBadge 3, 4, 5 or 6 = 0.2, 0.4, 0.6 or 0.8 x stake
hellcatraz-slot-shark-symbolShark 3, 4, 5 or 6 = 0.3, 0.5, 0.7 or 1 x stake
hellcatraz-slot-prisoner-symbolPrisoner 3, 4, 5 or 6 = 0.4, 0.6, 0.8 or 1.2 x stake
hellcatraz-slot-policeman-symbolPoliceman 3, 4, 5 or 6 = 0.6, 1, 1.6 or 2 x stake
hellcatraz-slot-wild-symbolWild Substitutes for all symbols

Hellcatraz Mobile

hellcatraz-mobile-slot

You can play Hellcatraz on desktop, mobile and tablet devices. Despite the 8-bit, 80s-inspired graphics, it uses HTML5 technology so can be enjoyed on iOS and Android devices.

Hellcatraz Bonus Features

It’s not just the design in the Hellcatraz slot that’s a little unusual. The gameplay is too, starting with the game engine. You’ll also see cascading reels which can in turn reveal special mystery symbols. There’s also an exciting free spins round which, once again, is triggered in an unorthodox manner. We’ll start by looking at the game engine setup.

Cascading Reels feature

A winning combination in the Hellcatraz slot game results in a cascade where the successful symbols are removed and new ones replace them. The cascades keep on coming until no more new wins are formed.

Mystery Reveal feature

Mystery symbols which appear in the form of a number can land on any spin. With each cascade, their number drops by 1. When it reaches 0, the mystery symbol is revealed.

At the start of the game, you’ll have the option of picking Lockdown Mode or Mixed Mode. In the former, all the Mystery Symbols have the same number. Choose the latter and there are independent counter numbers in play.

Super Free Spins feature

hellcatraz-slot-super-free-spins-feature

You’ll see keys appear overlaid on top of standard symbols. These can award between 1 and 10 keys. After any keys have been collected, the symbols act as normal. Instead of landing scatter or bonus symbols, collecting keys is how you trigger the main feature in this Hellcatraz slot.

The Super Free Spins feature is activated once you have collected 2,000 keys. You begin with 5 free spins. The Mystery Symbols are active in the bonus round. You don’t need to land successive cascades to open them during the free spins though.

Also joining the action during the free spins round are Golden Mystery Symbols. If there are 2 of these on the reels and you go on to land 2 or more cascades, you’ll get 2 more free spins added to your total.

Buy feature

There are a couple of options here. You can pay 200 x your total stake and buy the Super Free Spins feature directly. This doesn’t have any effect on how many keys you have collected. They remain the same and you’ll start adding to the same number when the free spins are over.

Alternatively, you can use up the keys you have already collected and then top up by paying extra. The amount you have to pay varies depending on how many keys you have already collected.

The Buy feature isn’t available in the UK due to regulations by the UK Gambling Commission.

Hellcatraz Review Summary – unusual, volatile gameplay

Ratings
Theme & Symbols








Sounds & Music








Bonus Features








RTP (96.46%)








Max Win (51,843.3 x)








Originality








The Hellcatraz slot is an unusual game but it’s one that offers something original. That’s true of the game engine, the base game features, the bonus round and the design. The Super Free Spins feature has the potential to be a cracker, especially if you manage to add extra free spins to your original allocation.

A trip to Hellcatraz certainly isn’t one for the faint of heart. The action here is super volatile. It can be a risky proposition for your bankroll but it can deliver some massive rewards. The maximum win of 51,843.3 x stake per spin is worth risking being bad for.

It’s about as far away from a classic slot as you can imagine but if you fancy trying something different, breaking into Hellcatraz could be the answer.

Another slot with similar graphics is Thunderkick’s Flame Busters which offers plenty of bonus features and 5,280 x stake wins on every spin. A second option would be the Street Fighter II: The World Warrior slot by NetEnt which is based on the infamous video game.

If you want more prison drama, the San Quentin slot by Nolimit City takes things to a whole different level. Based on the infamous prison, this gritty title offers over 13 million ways to win, Jumping Wilds with multipliers up to 512x as well as 150,000 x stake wins on each spin.

Relax Gaming has since released a jackpot version of this one, with a few tweaks. If you’re a fan of jackpot slots, check out the Hellcatraz 2 Dream Drop slot.

Pros
  • 51,843.3 x max wins
  • RTP well above average
  • 46,656 paylines
Cons
  • Super high volatility (10/10)
  • Low paying symbols

Hellcatraz FAQs

What is the Hellcatraz slot RTP?

This varies slightly depending on the round you’re playing. The Hellcatraz return to player rate in the standard game is a solid 96.46%. If you choose to pay to buy the Super Free Spins feature with the Buy feature, this increases to 96.83%. But this option is not available in the UK.

What is the Hellcatraz maximum win?

In theory, the potential jackpots on offer from a trip to Hellcatraz prison are absolutely enormous. The maximum win stands at a massive 51,843.3 x your total stake. That sum sounds like it should get you into rather than out of Hellcatraz.

Are there any Hellcatraz free spins?

Yes, this prison adventure does come with a Super Free Spins feature. It’s triggered in an unusual manner by collecting overlay key symbols.

What is the Hellcatraz volatility?

The virtual prison walls are highly volatile. This is a high-risk slot but the upside is the potential it offers to deliver some grandstand rewards. On a scale of 1 to 5, the Hellcatraz variance is a fiery 5.

Is there a Hellcatraz demo?

Yes, the Hellcatraz demo is available here at Online-Slot.co.uk. Discover the mystery lurking between the bars on laptop, PC, tablet and mobile devices.

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