Mental Slot Review

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Technical Table Information

InformationInsights of the slot
RTP (return to player):96.08%
Release Date:31.08.2021
Maximum Multiplier:66,000x 
Winning Lines:108+
Min bet ($, £, €): 0.20
Max bet ($, £, €): 100

Description of the Slot 

With the kind of slots Nolimit City usually releases, one might want to steer clear of a title that’s disturbingly called Mental. While the psychiatric theme is quite evident from the name, it’s the sheer spookiness of the slot that takes us by surprise. And guess who the most prized patient is in this mental institution? Hannibal Lecter! So, be prepared for a horror-struck scenario where the creepy Lecter and a few other inmates catch others by surprise and carve out their organs to put on display. Or perhaps to eat them. One never knows! 

Mental unfolds on a 5×3 grid panel arranged in a unique 3-2-3-2-3 formation. Betlines kick off at 108, but the reels can expand up to 20 rows, which also increases the winning lines. Rollers can start wagering within the betting limits of 0.20 to 100 coins per spin and win up to 66,000x the stake on their bets. Furthermore, the game’s default RTP of 96.08%, a high variance math model, and a hit frequency above 34% tempt one to give it a shot. Let’s see what else it has in store. 

Design and Audio 

The best way to describe Mental is to imagine a coalition of Silence of the Lambs movie and Resident Evil games. The creepy institution needs renovation, and that’s where most of the horror comes from. Blinking lights and the ominous background score are enough to send a shiver down a player’s spine. Moreover, the human organ symbols add to the spooky ambiance. Overall, the sound and visuals are splendidly executed and qualify Mental as one of the scariest online slots out there. 


Expecting a bunch of features from Nolimit City slots is quite commonplace. And so it is with this recently released slot.

Fire Frames 

On every spin during the base game, 1 to 13 random positions are lit by Fire Frames. Symbols landing in these frames split into two

Dead Patient 

Hitting 2 Dead Patients symbols triggers the Dead Patient feature. The segment unleashes one high-paying symbol with a latched multiplier between x5 to x9,999. Note that multipliers represent the number of reel symbols rather than the standard win multiplier. 

Enhancer Cells 

Enhancer Cells lie at the bottom of reels 2 and 4, which get active with 4 or 6 Fire Frames, respectively. The Enhancer Cells reveal one of the following modifiers: 

  • One of the five patient symbols 
  • A wild symbol
  • A standard Dead Patient symbol 
  • xWays: three matching symbols except for Dead Patient, Spider, or Scorpion symbols 
  • xSplit: splits a symbol on each reel into two parts and then splits itself into two 
  • xNudge Wild: the symbol nudges to become fully visible. With each nudge, the multiplier increments by +1. 

Mental Transform

Hitting spider symbols on reels 2 and 4 triggers the Mental Transform feature. Once active, the spider symbol converts into one of the following: xWays, xSplit, wild symbols, Dead Patient, or a standard patient symbol. 

Autopsy Free Spins 

Landing 3 scorpion symbols on reels 1, 3, and 5 triggers 8 Autopsy Free Spins. You win an additional free spin if a scorpion symbol lands inside a Fire Frame during the feature. Up to 5 positions get a Fire Frame, and when the frames appear, they remain on the reels till the feature ends. Upgrading the feature to Lobotomy Free Spins is possible by hitting a scorpion symbol. 

Lobotomy Free Spins 

Get 3 scorpion icons along with a spider symbol in a spin to trigger 9 Lobotomy Free Spins. The rules of Autopsy bonus spins are also applicable here. Moreover, if spider symbols hit during the bonus round, they become sticky and activate the Mental Transform feature on each spin. Also, the maximum multiplier value from each Dead Symbol gets collected along with its ‘count’. The Dead Multiplier gets transferred to its respective new patient symbols upon collection. The ‘count’ decreases by 1 with each multiplier transfer. 

Mental Free Spins 

Landing 3 scorpion and 2 spider symbols awards 10 Mental Free Spins. Triggering spider symbols become sticky in this bonus round and activate the Mental Transform feature on every spin. Moreover, the Dead Multiplier count does not decrease even after its transfer to patient symbols

Nolimit Bonus 

Provided the feature is available in your region, you can use it to purchase the following bonus rounds: 

  • 8 to 11 Autopsy Free Spins at 80x the stake 
  • 9 to 13 Lobotomy Free Spins at 230x the stake 
  • 10 to 15 Mental Free Spins at 1,000x the stake 
  • 8 to 15 free spins from any of the features mentioned above at 232x the stake 

Payouts, Theme, and Volatility

At the lower rung of the paytable are skeleton hands, lungs, hearts, brains, and eyes that offer 1x to 1.25x the stake for five matching ones. Following them are five patient characters enacting as the premium symbols, offering 1.5x to 5x the stake for lining up five identical symbols. 

Mental has a psychiatric horror theme where mentally-ill patients turn violent to wreak havoc in the asylum.  

Mental has extremely high volatility, which suggests wins might take a while before appearing on the reels. This game is suitable for those with a high-risk appetite.

About the Game Provider 

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Nolimit City has a decade-long experience in the igaming industry, which reflects in the quality of slots they release. The major selling points of Nolimit City slots are their unique themes and innovative design. The game provider also uses several in-house mechanics in their slots, like xWays, xSplit, xNudge, etc. Nolimit City has attracted numerous operators, including several top crypto casinos, with its quality performance and smooth platform integration. 

Final Considerations 

Mental is not for the faint-hearted, and we say that not only for its spooky theme or creepy characters. The game has an extremely high math model, which escalates the risk level a notch higher. Therefore, only those willing to take big risks should proceed with it. But, of course, the rewards for doing so are equally great. After all, a max win potential of 66,000x is worth the dare. Also, the detailed list of features might be overwhelming at first, but once you go through them, they are pretty simple and easy to grasp. 

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Our Mental review dissects the slot’s features, payouts, theme, design, volatility, etc. Still, for any queries related to the slot, you can communicate with us via the comment box below. We’ll try our best to assist you! 


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