Hellcatraz Slot Machine

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Hellcatraz demo
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Return to player Min bet size Game type Variance Reels Progressive Jackpot
96.83% 0.10 Video Slots High 5 No
Popularity Max bet size Game provider Bonus Features Paylines Theme
25 Relax Gaming Yes 46.656 Alcatraz

Return to player


Min bet size


Game type

Video Slots





Progressive Jackpot



Max bet size


Game provider

Relax Gaming

Bonus Features






Hellcatraz online slot game

Hellcatraz video slot is an awesome eighties-style slot game with cheesy graphics and tons of features. Choose between 2 game modes, reveal mystery symbols, reap the rewards of cascading reels, trigger free spins by collecting keys, or simply buy the bonus using a ‘buy feature’!

Theme and Story Line

Hellcratraz is an 80s style slot game taken from the famous Alcatraz prison. There cops, inmates, and prison guards spinning on the reels set on a prison island in the USA!

Graphics, Sounds, and Animations

As Relax Gaming is going for the eighties look and feel, the reels are fuzzy-looking giving you eighties-style gaming graphics similar to an old Spectrum computer used back in this era. The slot’s background is set during sunset overlooking San Franciso’s city skyline and Golden Gate Bridge. Police sirens blare out from US police squad cars and Hellcatraz prison ships bobble on the city’s waters. You will also be treated to eighties-style animated effects as well as a bubbly theme tune.

Hellcatraz 1

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There are 2 modes to choose from which are ‘Mixed Mystery Symbols’ and ‘Lockdown Mystery Symbols’. When the reels open up you will be introduced to a 6x6 grid system with cascading symbol wins. Behind the reels, there are 46,656 way- to-win!

Your job is to line up any of the 9 regular symbols into combinations of 3, 4, 5, or 6. The total spin bet payouts for lining up 6 symbols on a pay line are as follows:

  • Prison Guard - 2x
  • Inmate - 1.2x
  • Shark - 1x
  • Guard Badge - 0.8x
  • Handcuffs - 0.6x
  • Playing Card Suits - 0.4x

There is a 10th symbol on reels 2-6. This is the Hellcatraz slot’s wild which is the ‘W’. It will substitute for any of the above regular symbols as a wildcard.

Hellcatraz 2

Bonuses and Free Spins

Cascading Reels: All winning symbols explode off the reels and are replaced by new ones in an attempt to give you more winning combinations for the price of a single spin.

Mystery Symbols: Mystery symbols are available in all game modes and free spins. They are numbers and will reveal their prize after a certain number of cascades. The number is a counter on, and once it reaches 0, it will give you a mystery win.

Super Free Spins: 5 spins are awarded when you collect 2,000 keys. The Mystery symbols in free spins do not have a counter, so they will reveal your prize as soon they hit the reels.

Collecting Keys: Keys are laid on top of regular symbols and award 1-10 when they land In view. Quite often multiple keys will land on the reels giving you 50 to 100 keys.

Feature Buy: Choose to buy either ‘full feature free spins’ or ‘top-up’. The ‘full feature’ purchase awards 2,000 keys instantly while ‘top-up’ will fill up your current key count to 2,000.

Mixed-mode Vs Lockdown Mystery Symbols: In mixed mode, the mystery symbol counters start at are mixed from 1 to 5 while in lockdown mode they all start at 5 but reveal bigger prizes.

Bet sizes, RTP and Variance

Min-Max bets of 0.10-25.00 are set under the ‘$’ sign option. Then, you can find the slot’s RTP under the ‘?’ menu which is 96.46% for lockdown mode and 96.30% for mixed-mode. If you use the ‘Feature Buy’, the RTP is 96.83%. As for the variance, this depends on the game mode:

  • Mixed Mystery Symbols – High Variance
  • Lockdown Mystery Symbols – Super High Volatile


The 2 game modes, a buy feature, mystery symbols, the free spins bonus trigger along with cascading reels may not be features that are new to the virtual world of video slots, but there are very few slots that have integrated all of these features into one. With that in mind, Hellcatraz and its retro eighties design make this a unique slot game worth trying out!

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