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Mental Online Slot Review & Free Demo Play ✔️

Mental is an extremely volatile and creepy asylum slot from NoLimit City, and it plays out on a 3-2-3-2-3 layout with 180 default win ways. You can look forward to Fire Frames symbol splits, Dead Patient symbol multipliers up to x9,999, Enhancer Cells with 6 modifiers, Mental Transform and 3 bonus round levels. This can lead to payouts up to 66,666x your stake, and you can test the demo game and read our full review below.

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User Rating: 9.0/10 (2 votes)

Provider:Nolimit City
RTP 🔗: 96.09% [ i ] RTP Ranges!
Variance: HIGH
Max Win: x66666.00 [ i ]
Betways: 108 [ i ]
Release: 31.08.2021
SlotRank: 219
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Online Casinos in United Kingdom where you can play Mental

We scanned 726 United Kingdom online casinos and found Mental in 37 of them. 5 casinos put Mental in their lobby. Average position in the casino lobbies is 149.79 (Calculated for all 726 casinos). SlotRank for Mental for United Kingdom is 219.

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Mental slot Big Win September 2021

The atmospheric Mental slot from Nolimit City once again awarded its 66,666x top prize to some lucky gambler, who was trying his luck on September, 14. Betting $8 per spin, he triggered the free games, where he scored a staggering win of over $50,000.


Scorpion and Spider symbols appeared on the reels, which awarded 11 Mental Free Spins.


The Dead Patient symbols appeared in two spins in a row and revealed 30x and 15x Multipliers for the premium symbols.


The player had only 3 spins left when he finally achieved a win, albeit a small one of $192.


However, it all changed on the next spin when a bunch of 30x Multiplier symbols appeared in view. The payout hit the 66,666x cap and the feature ended awarding an unbelievable $533,328 prize to the player.

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Mental slot review

Last Update: 06.09.2021. Author: SlotCatalog.

NoLimit City keeps living up to the first part of their name again and again, and it will be interesting to see if they’ll ever attempt to top Mental when it comes to controversial and nasty themes. The asylum audiovisual presentation with sepia-toned symbols could hardly be more gut-wrenching and creepy. There is not even a hint of humor to be found here, like you get in most previous releases centered around a dark subject matter.

The complexity of this game is such that both reading about it, and watching it play out, is equally overwhelming. It’s gonna take a good while before you’ll be able to fully grasp what’s going on. The math model is rock solid as usual from this developer, and cracking the 66,666x potential comes with a disturbing amputation win cap story that’s already been censored in some markets. All in all, you’re in for a ride like nothing else out there in Mental, and burning the midnight oil might not be a good idea if you want to sleep well after.

Mental Slot - Reels Screen

Mental Slot Features

You will see that 1 to 13 positions are surrounded by flames in the base game, and these Fire Frames split symbols in two. The 5 patient premium symbols are worth 1.5 to 5 times your stake for 5-oak, while the low-value organ symbols pay 1 to 1.25 x your stake for 5 on a payline.

You trigger the Dead Patient feature when 2 Dead Patient symbols land, and one of them turns into a premium patient symbol with a multiplier of x5, x10, x15, x30, x50, x100, x300, x500, x1,000 or x9,999 attached. This equates to the number of symbols, so it’s not a regular win multiplier.

Reel 2 and 4 come with Enhancer Cells at the bottom position, and these are activated by 4 or 6 Fire Frames, respectively. Once triggered, the Enhancer Cells award 1 of 6 modifiers:

  • A simple wild symbol.
  • 1 of the 5 patient premium symbols.
  • A Dead Patient symbol.
  • xWays reveals 3 matching symbols (not scorpion, spider or dead patients).
  • xSplit splits a symbol on each reel in two, and splits itself into 2 wilds.
  • xNudge Wild nudges in place to become fully visible on the reel, and each nudge increases the win multiplier by +1.

The Mental Transform feature is triggered when you land spider symbols on reel 2 or 4, and these turn into an xSplit, xWays, Wild, Dead Patient or Patient premium symbol.

You win 8 Autopsy Free Spins when you land 3 Scorpion scatters on reels 1, 3 and 5, and each scatter landing in a Fire Frame awards +1 extra spin. Up to 5 random positions are upgraded with a Fire Frame, and these become sticky for the duration of the bonus round. The feature can be upgraded to both the Lobotomy round and the Mental round.

The Lobotomy Free Spins is triggered when you land 3 scorpion scatters together with 1 spider scatter. This awards 9 Lobotomy Spins, and the feature builds on the rules of the lower-tier Autopsy feature. In addition, all Spider symbols that land become sticky, triggering the Mental Transform feature on each spin. The highest multiplier from Dead Symbols is collected, and applied to any new Patient-symbol. You upgrade to the top-tier Mental bonus round by landing 2 spider symbols.

The Mental Freespins feature is triggered from the base game if you land 3 scorpion scatters and 2 spider scatters on the same spin. This awards 10 Mental Spins, and the ‘Mental Transform’ Spider symbol is sticky also here. The Dead Multiplier count does not decrease by 1 when transferred to a new patient symbol, like in the previous tier.

Non-UK players (if eligible in your jurisdiction) can take advantage of the Bonus Buy options as follows:

  • 8 to 11 Autopsy Spins cost 80x your stake (96.26 % RTP). Base game hit rate is 1 in 220 spins. Max win chance is 1 in 950,000. Upgrade to Lobotomy/Mental chance is 1/10.
  • 9 to 13 Lobotomy Spins cost 200x your stake (96.17 % RTP). Base game hit rate is 1 in 9,400 spins. Max win chance is 1 in 9.4 million. Upgrade to Mental chance is 1/25.
  • 10 to 15 Mental Spins cost 1,000x your stake (96.68 % RTP). Base game hit rate is 1 in 100,000 spins. Max win chance is 1 in 1.25 million.

The max win scenario, which involves the amputation of an arm (not all jurisdictions), is called the ‘This is Mental’ feature. It occurs if you hit the 66,666x potential, which is the hard-capped max win in this game.

The 200 Spins Mental Slot Experience

We have a jam-packed 8 and a half minute highlights video lined up for you this time, and we basically purchase all 3 bonus round tiers in chronological order. We’ve involved a bit of base game play also, and the bonus round cavalcade starts around 0:30. Hit the play button, lean back and enjoy the show!

Review Summary

You can seriously go ‘mental’ trying to wrap your head around everything that goes on when this thing fires on all cylinders (or even only 50 % for that matter). Mental is the most complex, convoluted and disturbing release in the history of online slots, which is a feat in and of itself. The visual presentation is excellent, but horrific at the same time, and everything is accompanied by a haunting soundtrack that will make your skin crawl.

Patient-1 is a dead ringer for Hannibal Lecter with the face mask, and it would take something like a branded Silence of the Lambs release to top this experience. Keep some lighthearted fruit slot handy though, as you will need to clear your head after even shorter sessions in Mental. On the brighter side, the very solid 66,666x potential comes with an exceptional overall 1 in 18 million win chance, and per usual with NoLimit City, you really feel the horsepower immediately when testing the demo.


  • Up to 13 Fire Frames split symbols per spin
  • Dead Patient symbol multiplier up to x9,999
  • Enhancer Cells w/ 6 modifiers
  • 3 bonus round levels
  • Win up to 66,666x your stake


  • Beware of adjustable RTP ranges
  • A bit overwhelming in more than one way

If you enjoy Mental Slot you should also try:

xWays Hoarder xSplit - comes with a post-apocalyptic theme, and you will benefit from up to 95,760 win ways in this NoLimit City release. The xSplit Wild combines well with the xWays symbols on the 3 middle reels, and these merge in the 4-tier bonus round that can lead to 11,030x payouts.

San Quentin xWays - is another extremely volatile NoLimit City release, and the prison theme is almost as disturbing as the game at hand. Enhancer Cells trigger xWays Mystery and Razor Split symbols, and the Lockdown bonus round comes with an eye-popping 150,000x potential.

Fire in the Hole xBomb - is a highly explosive and volatile mining slot from NoLimit City, and the roughneck dwarf is basically digging for his long lost case of brew. You unlock bottom rows via cascading wins, and xBomb Wilds explode symbols and increase the multiplier. The hold-and-win style bonus round comes with 6 modifiers, and you can win up to 60,000x your stake.

Video and Image gallery

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Mental Slot FAQs

❔ What is the RTP of Mental?

The highest 96.06 % Return to Player is very average. However, operators can adjust it down due to the customizable RTP ranges.

❔ How volatile is Mental?

This is an extremely volatile game, and you can therefore expect serious fluctuations on your bankroll in longer sessions.

❔ What is the biggest win possible?

You can win up to 66,666x your stake in Mental, which is a suiting number indeed.

❔ How does the Fire Frames feature work?

1 to 13 positions come with randomly placed Fire Frames per base game spin, and all symbols within these frames are split in two.

❔ What is the Dead Patient feature?

Land 2 dead patient symbols, and 1 of them turn into a premium patient symbol with a symbol multiplier (not a win multiplier) of x5 to x1,000 attached (in rare cases x9,999).

❔ Is there a free spins mode in Mental?

Yes, there are 3 bonus round levels, each building on the previous tier. All 3 can be purchased from the in-game menu (not for UK players).

❔ Can I play Mental Slot for free?

Yes, you can check out the free Mental demo game at the very top of this page (UK players must verify age first).

Scanned Countries

United Kingdom

Unfortunately the game Mental is not available for this market. Overall we have scanned casinos in 47 different markets. Mental is available in 36 countries. Markets with the highest casinos quantity are: FI, NO, CA, DE

Country Scanned [i] With Game [i] In Lobby [i] SlotRank [i] Action
Finland FI 536 136 19 120 See Data
Norway NO 434 123 8 304 See Data
Canada CA 470 123 13 185 See Data
Germany DE 467 97 11 192 See Data

Browse All Countries (36)

Mental Free Spins and No deposit Bonuses


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