Hellcatraz Slot Review
Get 100 Free Spins when You Bet £20
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Hellcatraz Demo
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3,000+
Up to 24 hours-
United Kingdom (UKGC)
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Hellcatraz Slot RTP, Details & Wager Limits
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
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 |
|---|---|
 Diamond | 3, 4, 5 or 6 = 0.1, 0.2, 0.3 or 0.4 x stake |
 Clover | 3, 4, 5 or 6 = 0.1, 0.2, 0.3 or 0.4 x stake |
 Heart | 3, 4, 5 or 6 = 0.1, 0.2, 0.3 or 0.4 x stake |
 Star | 3, 4, 5 or 6 = 0.1, 0.2, 0.3 or 0.4 x stake |
 Handcuffs | 3, 4, 5 or 6 = 0.2, 0.3, 0.4 or 0.6 x stake |
 Badge | 3, 4, 5 or 6 = 0.2, 0.4, 0.6 or 0.8 x stake |
 Shark | 3, 4, 5 or 6 = 0.3, 0.5, 0.7 or 1 x stake |
 Prisoner | 3, 4, 5 or 6 = 0.4, 0.6, 0.8 or 1.2 x stake |
 Policeman | 3, 4, 5 or 6 = 0.6, 1, 1.6 or 2 x stake |
 Wild | Substitutes for all symbols |
Hellcatraz Mobile
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
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.
Hellcatraz Review Summary – unusual, volatile gameplay
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.
Hellcatraz FAQs
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.
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.
Yes, this prison adventure does come with a $1. It’s triggered in an unusual manner by collecting overlay key symbols.
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.
Yes, the $1 at Online-Slot.co.uk. Discover the mystery lurking between the bars on laptop, PC, tablet and mobile devices.
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Chris is a slots expert that has reviewed and played over 10,000 slots online. Having being in the iGaming industry since 2004, he loves digging into the mechanics behind the slot games, playing the various bonus features and giving an honest verdict from a player’s perspective.
