by Nolimit City

Hidden away in a mental institute where no one dares to go, you'll find a group of sinister patients that are absolutely mad. Inspired by some of the most beloved films, Mental is a horror slot playing on 5-reels with 108 ways to win.

Developed by Nolimit City, this horror slot features the iconic xWays, xNudge, Autopsy Free Spins, Mental Free Spins and so much more in this absolutely bonkers slot. If you manage to survive this madhouse, you could win up to 66,666x your stake!

Slot information

RTP: 94.20%
Volatility: High
Max Payout: 66,666x stake
Reels: 5
Paylines: 108
Jackpot: No
Min Bet: 0.20
Max Bet: 70.00
Theme: Horror
Release Date: 31st Aug 2021

Our rating

“ Pure insanity in the best way with multipliers reaching up to x9999 ”

4.1 out of 5

Win potential

Play Mental

Jump straight into the action and play Mental now at the following fully licenced UK slot sites. These slot sites have been thoroughly audited and reviewed by the team here at Slot Gods to ensure they offer an exceptional user experience, are trustworthy, safe, secure, and boast the best selection of online slots in their portfolio including Mental...

Mental Screenshots

Mental Features

Mental is absolutely bursting with features, and it all starts with the Fire Frames. At any point in the game, 1 to 13 positions on the reels get a Fire Frame and will split into 2 parts for bigger wins. Alongside the Fire Frames feature, you can activate the Dead Patient feature when there are 2 Dead Patient symbols on the screen. It reveals one of the patient's symbols with a random multiplier between x5 to x9999.

X Mechanics

At the bottom of reels 2 and 4, you'll find Enhancer Cells that are activated with 4 and 6 Fire Frames. Each of the cells can reveal either one of the patients or the Dead Patient. On top of this feature, you also have the xWays which reveals 3 symbols of the same kind and expands the reel height. If more than one xWays symbol, then all the xWays will reveal the same symbol. This can expand the ways to win from 108 to 1 billion!

There is also the xSplit which splits one symbol on each reel and doubles those symbols. It even splits itself into 2 different wilds that can substitute all except the special symbols. Mental also features the xNudge wild which nudges wild to be fully visible on the reels and the win multipliers increases for each nudge.

If you land a spider symbol on reels 2 or 4, then the Mental Transform will be triggered. The symbol will transform into an xWays, xSplit, Dead Patient, wild or patient symbol.

Free Spins

Amazingly, there are three different free spins in this slot. It all begins with the Autopsy Free Spins which is triggered by landing 3 scorpion symbols. Each of the scorpion symbols with a Fire Frame awards +1 spin and only exist on reels 1,3 and 5. You can have up to 5 positions on the reels turn into a Fire Frame position and will stick throughout.

During the main game, you can trigger the Lobotomy Free Spins by landing 3 scorpion symbols and 1 spider symbol awards 9 free spins. Similarly, a scorpion or spider symbol with Fire Frame will give additional free spins. The spider gets sticky and triggers Mental Transformation during each spin.

The highest multiplier from each Dead Symbol is collected with its count which signifies the number of a particular patient symbol revealed. For example, if 3 patient-2 symbols are revealed with multipliers x5, x10, x15, then patient-2 would get multiplier x15 with a count of 3. After its collected, the Dead Multiplier will transfer to their respective patient symbols e.g patient-2 would get a multiplier of x15 on 3 different turns.

You can trigger the Mental Free Spins by landing 3 scorpion symbols and 2 spider symbols for 10 free spins. During Lobotomy Free Spins, you can upgrade to Mental Free Spins by landing 1 new spider symbol. Similarly, you can upgrade from Autopsy Free Spins to Mental Free Spins by landing 2 spider symbols.

The spider symbols become sticky and trigger Mental Transformation during each spin. If you trigger the Dead Multiplier, then it does not decrement after you transfer it to a patient symbol meaning that it keeps building up with each new Dead Patient.

Mental - X Mechanics

X Mechanics

This slot features the trademark x mechanics including xWays, xSplit and xNudge! These each enhance your gameplay through splitting symbols, nudging wins and expanding the reel height.

Mental - Dead Patient

Dead Patient

Landing 2 different dead patient symbols on the screen will reveal one of the patient's symbols with a random multiplier. Amazingly, the multiplier can vary between x5 to x9999!

Mental - Free Spins

Free Spins

There are 3 different free spin options each with its own perks and bonuses. Through landing scorpions and spiders, you can trigger Autopsy Free Spins, Lobotomy Free Spins and Mental Free Spins.

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Mental Review

There's nothing creepier than a dark and dingy asylum full of questionable characters, and that's exactly what you get in Nolimit City's Mental. This horror slot plays on 5-reels with 108 ways to win at the start but this can expand up to 1 billion ways throughout your gameplay.

With a crazy amount of features, you'll be going bonkers with everything happening on screen in this slot. If you manage to survive and make it through, you can win up to 66,666x your stake with multipliers reaching up to x9999!


The entire aesthetic of this slot is terrifying with it opening up in a dingy and grimy looking room in an asylum. All of the walls are mouldy and are filled covered in questionable stains that definitely look like blood.

On top of that, there are creepy symbols on the reels that include the 5 different patients in the game. Patient-1 is a Hannibal Lector looking man, whilst the others are just thoroughly creepy with Patient-5 having electroshock bands on his head and Patient-2 has a gag in his mouth with a needle in it. Overall, it's just so scary meaning Nolimit City have definitely done their job.

Each of the free spins takes you to a different room and the lighting is just entirely different. The slot becomes darker and the music gets more intense.

In terms of music, there are chanting noises mixed with eerie sounds that send a shiver down your spine. Of course, it fits in well with the visuals and definitely makes you feel like you are in a creep asylum.


There's a lot to unpack in this slot as there are loads of features. It can be quite overwhelming to newcomers to online slots, so it might be best to have a practice run on a demo mode first. Once you understand the mechanics, the gameplay doesn't seem as daunting.

All of the buttons can be found around the reels with the spin button and autospin just to the right. Far to the left, you'll find the bet level, sound and general paytable for further information.

Win Potential

Sadly, the RTP of this slot is 94.20% which is an insanely low amount for an online slot with the average being 96%. Mental has a high volatility level meaning that wins are generally paying out higher but less frequently.

Thankfully, the maximum payout for this slot is 66,666x your stake which is absolutely incredible. With the multipliers reaching up to x9999 along with all of the features, you'll have an even greater chance of winning a decent amount.

Our Verdict

What else can we say about this slot aside from the fact that it lives up to its name. Mental is a bonkers horror slot that is just crazy from start to finish. Whilst, there are a huge amount of features, they can be a little confusing to a novice so we advise you to play a demo game first before you jump into real play.

However, what Nolimit City deliver is brilliant with it almost being a masterpiece of a slot but it's let down by the low RTP. That's the only negative thing and you should definitely give it a spin at least. Check out pure insanity in Nolimit City's Mental.

Charlie Vogelsang
Reviewed by Charlie Vogelsang Last updated on

As the Content Manager at Slot Gods, Charlie is focused on staying on top of the latest slot releases as well as finding the most recent trends. She spends her day searching for the best slots to be reviewed as well as managing most of the content that you will find on the site. Whether it’s the latest slot review from Relax Gaming or a guide on a brand-new mechanic, Charlie will be sure to have it covered on Slot Gods.

Learn more about Charlie here

Play Mental

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