
A famous monster from literature, movies, and popular culture is the star of the Frightening Frankie slot machine. This 5-reel, 3-row game has 20 paylines and features high card symbols, burning torches, and bolts alongside Frankenstein’s monster.
He’s the wild symbol with the power to act as others when possible, while lightning bolts energise the gameplay as they award free spins where lower value symbols can gradually vanish from the mix. Potion scatter symbols also lead to a free games round, where once again high card icons can be removed, which makes it easier to win generous prizes and a 2x multiplier applies to all wins. Collect test tubes during this round to retrigger the feature with multipliers of up to 10x added on.
The maximum win from the Frightening Frankie online is equal to 2,800x the stake at our recommended online casino sites. It’s a high volatility game from the studios of Pragmatic Play and Reel Kingdom, with an excellent return to players of 96.53%.

Set to a suitably horror movie style soundtrack, the reels hold high card symbols covered in stitches, along with the themed items linked to the iconic tale of a mad scientist and his tragic creation. As well as featuring on the reels, an animated version of the monster lurches to one side, adding a macabre touch to the game. The spooky theme gets a further boost as bats swoop and the branches of twisted trees sway in the background as the reels spin.
The standard controls seen across the Pragmatic Play / Reel Kingdom range are in use here, and they make it an easy game to set up and play. You can play the Frightening Frankie slot with stakes from just 0.05 to a high limit of 250.00, and using plus or minus tabs to the sides of the bet indicator, pick from many options in between.
The ‘I’ button to the other side of the control panel opens a paytable which has details on features such as free spins and a list of symbol values that adjusts to match your stake.
There are 20 paylines crossing the 5x3 grid, with values of 0.2x, 0.4x, and 1.6x the bet from any matched high card symbol as 3, 4, or 5 land on a line from the left. The full moon symbol pays 0.6x, 1.2x, and 4,8x for the same outcomes. Frankenstein’s monster is the wild symbol of his own game, so has the ability to substitute for others if he can then complete or improve combinations. A full line of this mean green character also pays 16x your stake.
Options include playing on desktop platforms, Android, iOS, or Windows mobiles, while non-UK players also have the chance to buy into bonus rounds, spin the reels in Autoplay mode, or activate a quick spin feature for faster results.
You can also view the casino offers available to new players right here on Gambling.com.
Bolts of lightning each award from 2 to 6 Lightning free spins, but even one is enough to trigger the round. Every bolt that strikes during the feature removes a low value playing card symbol starting with the lowest-paying and moving up. Each lightning bolt also adds 2 to 6 extra spins, but once all playing card symbols are gone, no more lightning can appear.
Green potion scatter symbols trigger free spins and if they launch during the Lightning bonus round, they start once the feature ends, with any high card symbol removals carried across. Any 3, 4, or 5 scatters unlock 10, 15, and 20 Monster Trail free games respectively. Randomly, if just 2 scatter symbols land, another can strike the reels and trigger the round.
Once again, lightning removes the current lowest value playing card symbol for the rest of the round, making it progressively easier to win with those left in play as up to 5 vanish from the mix. There’s also a 2x multiplier on all wins over the course of the Monster Trail bonus round. Seven test tubes sit above the game and each tube symbol landing on the reels fills one up. Once all 7 are full, you get 10 extra free spins with a random 1x, 2x, 5x, or 10x multiplier added to the initial 2x value to wins throughout.
The maximum possible win equal 2,800x the bet, which is quite low for a game from these developers, where 5,000x or more is the norm. However, it’s a realistic target and as the bet limit is so high, actual prizes can hit as high as 700,000.00.
This is a high volatility game where a relative infrequency of wins is often cancelled out by high average prizes. Set your bet level with this in mind. Frightening Frankie has a return to players of 96.53%, which is an excellent rate.
The classic character features in many slots, but low maximum win aside, this is an excellent example of a game starring the lumbering monster from the Mary Shelly novel. It looks good, with several themed symbols alongside the stitched high card icons and comes complete with several electrifying features that bring the game to life.
Two free games rounds where lower value symbols gradually vanish are among the highlights. It’s the Monster Trail round where multipliers apply from the start and they can retrigger with an extra multiplier of up to 10x that stand out and this feature can run until you hit the 2,800x win cap.
Be sure to play at our approved online slot websites, as some sites lower the return to players. Pick a site from this page of gambling.com and unleash the big green guy as you play the Frightening Frankie slot machine.
Frightening Frankie has 20 paylines running from the left across the 5 reels and 3 rows. Match symbols in an unbroken run, with or without the help of a wild Frankenstein monster, and you win a prize.
Any time a lightning bolt symbol lands on the reels of the Frightening Frankie slot machine, it awards from 2 to 6 free spins, and several can strike at once. During the round, more lightning removes lower value playing card symbols, which makes it easier to win higher prizes.
You can play the Frightening Frankie slot for free without leaving this page. The free version is the perfect way to see how it looks and plays without the need to join an online casino or stake any real money.
Frightening Frankie is one of many games inspired by the same famous monster. Other popular examples include House of Horrors 2 by Big Time Gaming, Frankenslot's Monster from Betsoft, and Frankenstein's Rebirth by Spinomenal.
Pragmatic Play and Reel Kingdom partnered up to make the Frightening Frankie slot. They are also behind a huge range of other big hits that you can play at our favourite casinos, with Finger Lick’n Free Spins, Hot to Burn, and the fishing / monster themed Big Bass Halloween series among them.