Horror movies make great themes for online slots, but for some reason, Frankenstein slots are not among players’ favourites. It’s strange because some of the ones we are going to tell you about are pretty entertaining. They vary in character from the light-hearted to the heavier and sometimes darker side of the genre, and on this page, the team here at GamBonus.com highlight some of the very best for your gaming pleasure.
The Frankenstein Slot from KA Gaming

Screenshot of Frankenstein by KA Gaming, Courtesy of Bspin Casino
The Frankenstein slot machine online game from KA Gaming is a fine example of the lighter fun side of monster-themed slots. It’s a 5×3, 50-payline, medium volatility game with a 96% RTP. It’s not a feature-rich slot, which may explain why it’s not ranked in many players’ favourites, but, with its cartoon-like symbols and quirky soundtrack, it’s a fun slot to play.
Frankenstein casino game Paytable

Screenshot of the Frankenstein slot Paytable
In addition to the symbols shown in the screenshot of the game’s Paytable, there is a Wild and a Scatter. The Wild is Frankie himself, and he substitutes for all of the other symbols except the Scatter. The Scatter is the life-giving Spark Machine, and you need to land 9 on reels 2, 3, and 4 to start the free spins bonus round.
When the free spins feature begins, the 3 centre reels morph into one giant symbol which, when spun, spins alongside the normal-sized symbols on reels 1 and 5. You get 8 free spins each time the feature is activated.
GamBonus Concluding Thoughts
The Frankenstein slot machine online game isn’t the most demanding slot to play. The gameplay is simple, and the bonus feature, free spins, presents an opportunity to land some decent-sized wins. Being a medium variance slot, the wins come regularly enough to keep you happy. It’s also one of several Frankenstein slots with a free demo version, so why not give it a whirl?
The Frankenslot’s Monster Frankenstein Casino Game by BetSoft

Screenshot of Frankenslot’s Monster from BetSoft courtesy of Bitstarz Casino
The Frankenslot’s Monster 5×3, 20 payline slot by BetSoft is another light-hearted Frankenstein casino game. You’re left in no doubt by the ‘Munsters-like’ soundtrack, which starts up as soon as the game downloads. To be honest, you’ll want to turn it down or off as it begins to grate after a short while. However, unlike the previous game, Frankenslot’s Monster is feature-rich, and the graphics that accompany the Experimental Bonus round are excellent.
The Frankenslot’s Monster Paytables
For the sake of clarity, the paytables are split into high and low value symbols.

All symbols pay from left to right, and where there is more than one winning payline, the highest is paid.

In addition to the symbols shown in the 2 paytables above, there is a Wild, which is the word ‘WILD,’ and a Scatter, which is the word ‘Scatter,’ and which only appears on reels 2, 3, and 4. When land 3, you trigger 8 free spins.
There is also an Experimental Bonus, which is triggered when you land 3 Bonus symbols anywhere. They appear on reels 1, 3, and 5,
There is also a ‘Double Up’ feature where you get to flip a coin to double your win or lose it altogether.
GamBonus Concluding Thoughts
A lot of attention has been paid to the visuals of Frankenslot’s Monster, which makes it an engaging Frankenstein slot machine online game that is well worth playing. It’s a medium-variance game, so the wins are decent and reasonably regular. You also get the chance to double up your wins, which can result in some sizeable payouts, up to 5,000x your wager. The RTP is 96.83%.
Fright Night Frankenstein Casino Game by Caleta

Screenshot of Fright Night by Caleta Gaming courtesy of Weiss Casino
Like so many of the Frankenstein slots, Fright Night is light-hearted, has cartoonish symbols, and a jaunty soundtrack.
Not a totally Frankenstein-themed slot, the symbols of Fright Night by Caleta include Frankie himself, Dracula, a Floatie Ghostie, Bats flying across the Moon, a Skull and Candle, a Black Cat, a Corked Vial, a Book of Spells, a Pretty Witch, and what appears to be a Hairy Acorn. The highest paying symbol is the Pretty Witch, which pays 0.50, 3.75, and 7.50. and 25.00 for 2, 3, 4 and 5, respectively
In addition to the paying symbols listed above, Fright Night also has 3 special symbols, as shown in the screenshot below.

You might not have heard of Caleta Gaming before. They are a smaller, ‘boutique’ studio that creates feature-rich games, of which Fright Night is an excellent example.
Features of Fright Night by Caleta Gaming
As well as the usual free spins rounds, there is a special Potions Bonus. You trigger this by landing 3-matched coloured potions. It unlocks a special game mode featuring Frankie, the Ghoul, Dracula, and Wendy the Witch. Pick one to collect your prize.
If you can’t wait for the bonus to appear, you can use the game’s ‘Buy’ feature.
GamBonus Concluding Thoughts
Although it’s not strictly a Frankenstein slot machine online game, Fright Night does feature Frankenstein amongst a host of other stars and symbols. The RTP range is from 96.04% to 96.27% depending on game mode, and it’s a good example of a medium variance slot that gives you a good mix of regular-sized wins, with an occasional larger one thrown in to keep you interested. Worth a few spins.
The Freaky Frankenstein Casino Game by Nucleus Gaming

Screenshot of Freaky Frankenstein by Nucleus Gaming courtesy of Fairspin Casino
When the team here at GamBonus first tried the Freaky Frankenstein slot by Nucleus Gaming, the first thought that sprang to mind was that they must have taken their inspiration for this slot from another Frankenstein casino game – Frankenslot’s Monster. The design of some of the symbols is remarkably similar. The other similarity is the Free Slots feature, which grants you 8 spins when you land 3 Scatters in either game.
The One-Armed Bandit Shock Bonus Round

The saving grace about this slot, and the thing that defines it apart from Frankenslot’s Monster, is its unique bonus game. You activate this by landing 3 Bonus symbols. They only appear on reels 1, 3, and 5. You then get the opportunity to adjust the levels of the blue, red, yellow and green sliders to select the size and type of shock you will send to the monster. Once you’re happy with the levels you’ve set, pull the handle by clicking on it. You’ll be randomly awarded a prize of up to 25x your bet.
GamBonus Final Thoughts on Freaky Frankenstein By Nucleus Gaming
Like its counterpart, Frankenstein’s Monster, Freaky Frankenstein is also a 5×3, 20 payline slot, but the RTP is lower at 96.1%. Being as they are both so similar, it’s a case of playing one or the other. Try the free Frankenstein slots versions first before you decide which one to spend real money playing. You’ll find a demo of Frankenstein’s Monster at Bitstarz Casino, and a demo of Freaky Frankenstein at Fairspin Casino.
Haunted House by Habanero

Screenshot of Haunted House by Habanero courtesy of Weiss Casino
Haunted House by Habanero is not a Frankenstein slot machine online game that is solely themed on our monster chum, but he does feature as the slot’s Wild. He substitutes for all other symbols except the Lady Vampire double symbol and the Haunted House Scatter.
There is no running soundtrack, which many players will find a relief, but certain landed symbols have their arrivals announced. The appearance of the Haunted House Scatter is greeted with a dramatic chord thumped out on an organ. Frankie growls, and his skeleton blinks in and out of view, and the Lady Vampire gets a few notes on the organ when she’s part of a winning combo.
Special Symbols With Added Value

This is one of the Frankenstein slots, whereby the special symbols don’t just trigger features. They also have prize values. The Frankie Wild pays out 10, 100, or 1,000 coins for 2, 3, and 4, respectively, while the Haunted House Scatter pays 2.50, 5, 25, or 500 coins for 2, 3, 4, and 5, respectively.
The Haunted House Bonus Pick Feature
Habanero also built a Bonus Pick feature into this Frankenstein slot machine online game. It’s triggered by landing 3 or more Haunted House Scatters. You must then choose one of the house’s windows to reveal the game amounts. You might also reveal a ghost or 2. Once you’ve landed 2, the free game amounts are totalled and awarded, and during bonus play, all prize amounts are doubled.
GamBonus’s Concluding Thoughts of Haunted House by Habanero
This 5×3, 25-payline slot is an enjoyable game to play. Its Bonus Pick feature is a nice addition, but you’ll need a fairly big bankroll to land it. In the meantime, you’ll land a few small and medium-sized wins, all typical of a medium to high variance slot. The RTP is 96.14%.
The Frankenstein’s Rebirth Slot by Retro Gaming

Screenshot of Frankenstein’s Rebirth by Retro Gaming, Courtesy of Fairspin Casino
Frankenstein’s Rebirth by Retro Gaming is quite different from any other Frankenstein slot machine online games. It’s a simple 3×3, 5-payline format that harks back to the retro days of one-armed bandits, but with a surprising twist. It has a reel lighting mechanic that injects an element of surprise and unpredictability into every spin.
Its simplicity is actually remarkably endearing. The game is played against the backdrop of a dusty, old chemistry lab. The theme is light-hearted, but its fiendish cartoon-style drawn symbols and spooky soundtrack give this Frankenstein casino game a touch of unease, which creates an interesting atmosphere.
Frankenstein’s Rebirth’s Free Spins Chase’N’Win Feature
Each time the ‘Chase’ Scatter lands on a reel, it lights that entire reel up. Land 1 of 2 Chase symbols and you will be rewarded with 1 free spin.

If you manage to land 3 ‘Chase’ Scatter symbols, all 3 reels will be lit up, and you will be awarded 10 free spins. The ‘Chase’ Scatter symbol pays out 1 x your stake.

The bet-per-line remains the same as it was during the spin that triggered the free spins round.
When, during the free spins round, a Chase’N’Win Scatter appears, it will fill 1 cell in the multiplier bar that surrounds the slot. It begins at 2x and finishes at 5,000x. Should 1 or more ‘Chase’ Scatters land while the free spins round is active, it triggers 5 more free spins.
This Frankenstein casino game also features a ‘Buy’ option, which grants you immediate access to the free spins feature if selected. The buy price is set according to the amount you wager,
GamBonus’s Concluding Thoughts on Frankenstein’s Rebirth by Retro Gaming
Frankenstein’s Rebirth by Retro Gaming is a surprisingly good game, where nostalgia meets novelty, and it works well. It’s a medium to high variance slot, so you need to have a little patience to trigger the bigger wins in the Chase’N’Win bonus round. Its quirkiness is its charm, and it’s one of the Frankenstein slots you might well enjoy. If you like to try free Frankenstein slots before parting with your hard-earned cash, you’ll find a demo version of Frankenstein’s Rebirth on the Fairspin Casino website.
The Halloween Wins Slot by Red Rake Gaming

Screenshot of the Halloween Wins Slot by Red Rake Gaming, courtesy of Cloudbet Casino
The Halloween Wins slot by Red Rake Gaming is the last of the Frankenstein slot machine online games we review on this page, and it’s one of the best. Once again, it’s not solely Frankenstein themed, but Halloween in general. Among a plethora of ghouls and things that go bump in the night, Frankenstein is one of the game’s excellent features – the Triple Electric Wheel.

The Feature-Rich Halloween Wins Slot
With its Wilds, Dracula Respins, Frankie’s Electric Wheel, the Ancient Mummy mini-game, plus its expanding, random multiplier Wilds, Halloween Wins is a feature-studded slot.

Screenshot of Halloween Wins Symbols from Red Rake Gaming, courtesy of Cloudbet Casino
Red Rake has taken particular care in choosing the graphics and symbols to offer the player a super-engaging atmosphere. There’s plenty going on in the soundtrack and the graphics when you land Wild wins go up to a new level.
GamBonus’s Concluding Thoughts on Halloween Wins by Red Rake Gaming
This is an excellent 6×4, 50 payline slot that has been designed to engage. It does its job well, so make sure you don’t get overexcited and stick to gambling responsibly. It’s a low variance slot, so you can expect the wins (albeit smallish) to come quickly and regularly. The RTP is 95.3%