Introducing Mystery and Horror Themed Online Slots

We’ve rounded up some of the best mystery and horror-themed slots around today on this page. These slots may appear scary, but they’re not that frightening. They’re great casino games to play. Thanks to their creative, detailed design and unique features, they are exciting indeed. So keep on reading and discover some of the top slots themed to mystery and horror around today.

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Best Mystery and Horror Slots Online Casinos

100% up to £25 +25 SPINS ON STARBURST
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When you open new account, you have the option of not receiving the welcome bonus, by clicking ‘later’ at the end of registration process. When you choose the option of receiving the CampeonUK welcome bonus, you are subject to the bonus policy. New depositing players only. Min. deposit: £20. Max. bonus: £25. Offer valid on first deposit. Offer only applies to new players.
100% bonus up to £25 20 Bonus Spins on Book of Dead
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*18+. New UK customers only. Opt-in required. 20 Bonus Spins on "Book of Dead" and 100% Deposit Bonus up to £25 on first deposit. Min deposit £10. 30x wagering requirement for Bonus Spins and 30x wagering requirement for Deposit Bonus (game weighting applies). Max £5/spin or £0.50/line or £50/round (live casino). 30 days expiry. T&C's Apply.
€1000 + 175 FS
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500% up to 500 cash bonus offer
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up to $/£800 BONUS
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New customers only. Opt-in required. 1st deposit bonus 100% up to £200. 2nd deposit bonus 50% up to £200, 3rd deposit bonus 25% up to £200, 4th deposit bonus 25% up to £200. Min deposit £10. 40x wagering, 30 days to complete wagering, game weighting and game restrictions apply. Max Bet with bonus funds £5. Max withdrawal from bonus funds is £2000. Neteller and Skrill excluded. Eligibility restrictions apply, cash balance can be withdrawn at any time. Full bonus terms.
100% up to €100 + 120 bonus spins in Book of Dead
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Does not accept UK players.

What Are Mystery and Horror Themed Slots?

Mystery and Horror Themed Online SlotsSo what exactly are mystery- and horror-themed slots? They’re simply slots that are themed to anything mysterious, peculiar, creepy or scary. The characters appearing in these slots tend to be hideous monsters, dangerous murderers, terrifying ghosts and people with downright sinister objectives. The slots tend to have dark colour schemes and can have quite grisly, unsettling graphics, but don’t let that put you off – the slots can still be entertaining and rewarding!

The Movie-Inspired Halloween Slot

The movie Halloween is one of the horror genre’s most popular and influential titles. It was released in 1978 and has spawned no fewer than 11 spin-offs/remakes. The Halloween slot by Triple Edge Studios features some of the original film’s characters and does a brilliant job of bringing the terror and fear of the film to life.

What makes this slot appealing? Exciting features and 50 paylines being active on all spins make this game undoubtedly attractive to the players. The features include extra-large 3×3 Jumbo Blocks, a pick-me game with cash prizes and a free spins round. In addition, the action takes place right outside the Strode house, which is one of the film’s best-known locations.

Check in to the Mystery Motel

In many classic horror films, motels are where unfortunate incidents take place – think Psycho. Mystery Motel is a slot by Hacksaw Gaming with 1,024 ways to win on all spins and several specific features that may convince you to book a stay and give the slot a spin.

The slot has a 50s vibe, but there’s still a somewhat mysterious atmosphere to the place – the wild, for example, is a ghostly green hand reaching out from a suitcase! The wild isn’t to be feared, though, as wilds can come with x2, x3 or x5 multipliers to boost your wins.

The car being overtaken by an octopus is the scatter. Land three or more scatters, and you’ll get to spin the Spooky Bonus Wheel, which can award cash prizes, free spins and upgrades to wheels with better prizes. The slot’s free spins round can be retriggered and comes with more wilds to help you win more often.

Explore the Mystery Museum

The premise of the Mystery Museum online slot by Push Gaming is that ancient artefacts in a museum are coming to life at night. These include Greek shields, Egyptian pharaoh masks and Samurai helmets. The slot’s RTP is impressive at 96.56%, but it gets even higher during the Power Gamble feature – as high as 97.04%.

The Power Gamble feature comes into play whenever you win over a predetermined amount of money but less than 100x your total bet. This bonus gives you the chance to gamble your winnings to earn free spins or increase your winnings.

The slot’s other features include Mystery Stacks and free spins. If three or more Mystery Stacks appear, they’ll nudge to fill the reels they’re on and will reveal the same standard symbol; they pay on all paylines regardless of their location. As for the free spins round, this starts with 8, 10 or 12 spins, and all Mystery Stacks are sticky – they stay where they are for all free spins.

Open the Book of Madness

Created by Gamomat, Book of Madness is a terrifying online slot game set in a not exactly clean or welcoming hospital. Instead, this hospital is abandoned, dirty and unsanitary, with an excess of blood on the walls. The slot’s main characters are a fierce werewolf and a bloodied zombie nurse. Both of them appear as symbols on the reels alongside things like syringes, bags of blood and a blood-soaked bed.

You’re able to play with up to 10 paylines active on all spins. The slot’s highlight is the free spins round, which is triggered whenever three to five bloody book wild/scatters appear on the reels. You’re awarded ten free spins, and before you start using these, one of the slot’s standard symbols is chosen to become the special expanding symbol. Whenever this symbol lands, it expands and fills the reel it’s on. If doing so, you win.

Dare to Join the Circus of Horror

The final entry on our list is the GameArt slot Circus of Horror. The name says it all: this slot is themed to a horrifying circus full of freakish and frankly terrifying acts. It’s a highly volatile slot with an excellent RTP of 96.68% and a host of nice features.

There are 243 ways to win on every spin, and when you do win, a gamble feature allows you to increase your winnings, but there’s a risk you’ll lose everything. There’s a free spins round where all winnings are trebled, plus the Electric Chair bonus round where you select body parts to be zapped and can win cash prizes. Moreover, the slot has sticky wilds in the base game and stacked wilds in the free spins.


In this post, we’ve looked at five of the creepiest and most unsettling online slots around today. If these slots don’t freak you out too much, be sure to give them a try and see what they’re like yourself. Play them for free first, then switch to playing with real money when you’re ready to gamble.

If you find yourself enjoying these slots, the good news is that there are loads of other scary slots out there. Scroll through your casino’s collection of slots, and you’re sure to find some being mysterious and terrifying. Play them if you dare!