Forget everything you know about traditional video slots and open the door into a crazy world where the madness never ends. In this dark release, Nolimit City is taking you inside the sinister asylum to get you introduced to patients 1-5. Open 24/7, the institution comes equipped with a haul of boosters and mega multipliers, but the max win potential of 66,666x is reserved only for those who dare to visit.
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What does John have to say?

Mental is anything but a traditional slot. It’s well-executed and contains an insane win potential, but the disturbing theme and complex bonus features won’t be to everyone’s taste.

Up to 20% Cashback for each deposit

Play Now Terms & conditions apply
  • Thumbs-Up Dead Patient multiplier of up to x9,999
  • Thumbs-Up 66,666x max win potential
  • Thumbs-Up 3 linked free spins bonus rounds
  • Thumbs-Down Complex bonus features
  • Thumbs-Down Mundane RTP

Mental Review

Nolimit City clearly has a thing for sinister themes, or they’re just trying to attract attention. First, it was the shocking San Quentin slot, but in this horror-themed release you’ll find yourself in a dingy mental institution. Be ready to face some brutal bonus features where Lobotomy is still a thing, and dead multipliers can appear from the darkest corners.

As well as the game’s gory features, the symbols aren’t any friendlier either. The low paying icons come as the brain, lungs and other human organs, while the high paying symbols are the disturbed patients.

Featuring 5 reels in a 3-2-3-2-3 configuration, up to 20 paylines and 108 ways to win, the set-up is not original, but effective. The sepia tone is also atmospheric, but has the developer taken a step too far with such a sensitive topic? Read our slot review below to see if you can stay sane trying to work out all the details.

SLOT FEATURES Fire Frames, Multipliers, Enhancer Cells, xWays, xNudge, xSplit, Symbol Transformations, Free Spins, Buy Bonus Feature
RELEASE DATE 31st August 2021
SLOT TYPE Video Slot
THEME Horror
REELS, ROWS, PAYLINES 5 Reels, up to 20 Rows, 108 Ways to Win
BET LEVELS £0.20 – £70
MAXIMUM WIN 66,666x Your Stake

Mental screenshot

Mental Bonus Features

The team behind Nolimit City did not spare any time nor energy when crafting the bonus features appearing in their latest panic-filled creation. So, be prepared; this slot is fast-paced and positively complex.

Luckily, most of the initial features, containing additional sub-features, can be triggered from the base game, including the free spins bonus rounds. As well as being triggerable from the main game, the 3 different free spins games are linked and can be upgraded throughout the play if you can land the required symbols. One thing is for sure: this slot is absolutely mental!


Skulls of the deceased patients act as wild symbols that can improve and complete a winning combination. They substitute for all other symbols, except for scorpions, spiders and dead patients. Additional xNudge wilds can also appear in later stages of the game.

Fire Frames

This is a random event during which any of the grid’s 13 cells can catch fire, and any symbols that land within the burning positions split into two. 4-6 fire frames will activate the Enhancer Cells feature.

Dead Patient

Triggered with 2 dead patient symbols, the Dead Patient feature reveals one premium dead patient with a x10, x15, x30, x100, x200, x500, x1,000 and a truly mad x9,999 multiplier.

Enhancer Cells

As seen in the developer’s previous releases, Enhancer Cells can be found at the bottom reels 2 and 4. When triggered, they reveal the following side effects:

  • 1 of the 5 patient symbols.
  • A standard dead patient symbol.
  • A regular wild symbol.
  • xNudge wild which always nudges into full view and increases the multiplier 1x for each nudge it takes.
  • xWays. This will expand the reels and reveal 3 identical symbols except a scorpion, spider and dead patient.
  • xSplit. Splits any symbols into two before splitting itself into 2 wilds.

Mental Transform

Initiated with a spider symbol on reels 2 or 4, the feature turns the triggering spider into either xWays, xSplit, dead patient, wild or regular patient symbols.

Free Spins

As mental as this slot is, it comes with 3 different free spins bonus rounds, each with its own special boosters.

Landing 3 scorpion symbols on reels 1, 3 and 5 in the base game will activate the Autopsy Freespins bonus round with 8 free spins. If any of the scorpions land in the fire frame, you’ll pick up an extra 1 free spin. During this round, you can have up to 5 sticky fire frames added.

A combination of 3 scorpions and 1 spider symbol leads you to the grim Lobotomy Freespins round with 9 initial free spins and game boosters from Autopsy Freespins. As in the previous round, each symbol appearing in the fire frame awards an extra 1 spin. On top of that, the triggering spider symbol becomes sticky and enables the Mental Transformation feature. And there’s also a Dead Multiplier sub-feature where multipliers get collected and then applied to their respective patient symbols to increase your possible wins. Each time you receive a boost, the multiplier count decreases.

Last but not least is the Mental Freespins bonus round featuring 10 free spins and game enhancers from the previous Lobotomy round. This round activates with a mix of 3 scorpion symbols and 2 spiders, both of which are sticky for triggering the Mental Transformation feature. Unlike Lobotomy free spins, Dead Multipliers here are persistent for as long as new patient symbols are revealed.

Mental Jackpot

Mental is not a jackpot slot, but it still offers an insane max win potential of 66,666x your stake.

RTP and Volatility

Rated as extremely volatile by the developer, the slot isn’t all that mental when it comes to the RTP figure. The default rate is set to a mundane 96.06%, with room to drop even lower, to 94.08%. The only time the figure can increase above the default rate is when using the bonus buy feature.

Where to Play Mental

If you’re in the mood for some sinister gameplay, look for the Mental slot at Skol or other similar Nolimit City casinos available to explore on our current toplist.

Mental on Mobile

This mental asylum isn’t just open for desktop users. Anyone wishing to experience the horrors of some barbaric medical practices can join in the misery via Android and iOS mobile devices.

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