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Frankenstein Monster Mash Up mobile slots by Mr Spin
Jackpot £7,786.13

Frankenstein Monster Mash-Up

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Frankenstein Monster Mash-Up Online Slots

Welcome Doctor, to Frankenstein Monster Mash-Up; an online slots exclusive to Mr Spin Casino. Spin the reels with the help of your lab assistants to bring to life some ghoulish prizes that have never been seen before. Keep your wits about you though. All is not as it seems in this laboratory.

Frankenstein Monster-Mash Up features 15 wicked win lines, a monstrous mini-game, and a huge progressive Jackpot that sure is tastier than boring old brains. Mmmm…brains… Just be careful not to lose your head…

Everyone said the Doc was crazy. They all told him it couldn’t be done. But one dark and stormy night, he proved them all wrong. He created the Monster – a creepy mash-up of body parts (and fish for brains) and the rest as they say, is history.

Now, alongside his other creations and lab assistants, Swamp Hag, Lizard, Rusty and Eve, join the Doc as he tries to mash-up some more monsters and create something seriously creepy. Sparks will fly in the Mr Spin mobile slots extravaganza. Are you brave enough to stay the night?

Frankenstein Monster Mash-Up Online Slots Index

Getting Started

Getting this experiment underway is as simple as adjusting your bet amount and number of win lines you’re playing across using the ‘+’ and ‘-‘ buttons. You can increase or decrease either of these options which, we’ll be Frank, alters your total bet amount!

You don’t need to be a mad scientist to figure out your total bet value! Simply multiply your bet amount by the number of win lines you’re playing across. So, for example, you bet 10p across all 15 win lines, your total bet amount will be £1.50, alternatively you could increase your bet amount and lower the number of win lines for a different mash-up, the choice is completely yours!

The Doc has set minimum bets at a scientifically low of 2p per line, while the maximum bet when playing for real money is £20 a line.

In case any of Frankenstein’s creations make a pass at you, you can keep your hands free with an ‘Auto Spin’ feature, which allows you to set the number of spins, minimum credit limit, and highest win value, before pressing ‘Start’ to begin your automatic spins.

In case you’re feeling ghoulish at the number of automatic spins that are rolling in, you can return to manual spins at any time by tapping ‘Stop’, which will return you to normal gameplay.

How to Play

After setting a total bet amount that doesn’t give you a fright, tap ‘Spin’ and Dr Frankenstein’s reels will roll in and stop at random.

Wins in Frankenstein’s lab pay left to right and the number of spooky symbols you need to line up depends on the win you’re after. Some will be awarded with 2 or more symbols on an active line, while others will be deemed a win with 3 or more matching icons on a line.

All of your electrifying wins will be highlighted on-reel before any associated winnings are added to your account balance.

Reel Wins

It’s scary how much you could win if you line up matching symbols on a win line, with wins multiplying your original bet depending on the symbols you line up.

Mr Spin’s not a monster, so he’ll add up wins across multiple win lines to give you a higher accumulative total win, but only the highest win on each individual line will count.

Wild Symbols

You could bag yourself some gory ghoul-d if you happen to see Wild symbols placed in the right places on an active win line!

That’s because Wild symbols substitute for any other symbol to make up a win. So for example if you roll in two A symbols and a Wild you’ll pick up a shocking win that would be the equivalent of you simply spinning in 3 As!

Don’t get too excited if you see a Wild symbol next to mini-games or Free Spins symbols! Those are the only two symbols that Wild cannot swap in for! It’s also important to note that you can’t win the progressive Jackpot with a Wild symbol on the win line.


There are loads of chances to win monstrous money in the Monster Mash-Up mini-game. Line up two or more ‘Eve’ symbols to make your way further into the lab. Here, you’ll find the Doc’s monster making machine. Can you cook up a creepy creation and bag a mega multiplier?

Press ‘Spin’ to get to work and try to match your monster’s body parts. Match three body parts successfully for a shocking bonus. But even if you create a mismatched monster, you’ll still walk away with some Frankencash.

Bonus Free Spins

Line up enough Free Spin symbols and you could see your experience powered up with free spins! Manage to mash-up 3 Free Spin symbols on an active line and you’ll bag 5 free spins, 4 symbols will unlock 7 free spins, while 5 symbols will see your account come alive with 9 free spins.

We don’t want to shock you, but the value of your free spins will lock to the bet and win line parameters of your last spin.

These in-game free spins splice together with a welcome bonus that could see you dig up bonus credit worth up to 50 free spins* if you’re a new player at Mr Spin. That’s creepy cash to experiment with, without having to deposit any of your own Franken-cash.

Found an exclusive slots game that’s now your favourite haunt? Make a first deposit and we’ll match it 100% up to £100*. The thing that’s most scary about these casino bonuses is that they come with no wagering requirements!

*T&Cs apply.  18+. New players only. Up to 50 locked free spins available to win via the New Player Bonus, usable on Reel Royalty only. All winnings paid as bonus credit. This Bonus expires 24hrs after player registration. 100% deposit match of first deposit, up to £100 and paid as bonus credit with a 1x wagering requirement. Bonus credit transferable between games but cannot be withdrawn. Max withdrawal without depositing is £50. You can withdraw any unspent deposit, in addition to the funds in your cashable credit account. BeGamble Aware.

Progressive Jackpot

The occurrence of 5 (five) “JACKPOT” Jackpot symbols on an active win line awards a progressive Jackpot. The progressive Jackpot is available on any bet, with 0.005% of the bet being added to the progressive pot. There is no hidden reserve pot.

When the Jackpot is won, it is reset and begins to rise again. Simultaneous wins can occur, if another player wins the progressive Jackpot then a notification to this effect would occur BEFORE the current player was awarded the Jackpot.

The game Jackpot seed value is £2000. The Jackpot is individual for this game, it is not shared with any other games.

In the event of a communication error after a progressive win result has been determined and before it has been displayed on screen, the win amount will automatically be transferred to the player’s account. While the game is live, the Jackpots cannot be terminated.

Payout Information and Game Rules

Frakenstein Monster Mash-Up online slots has a theoretical return to player of 93.46%. This is based on long term playback. System malfunctions void all payments.

Monies are staked in the following order: winnings, player deposits, bonus credit.

Mr Spin general T&Cs apply. Please note that deposits are non-withdrawable.

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