Mental Free Play in Demo Modeby Nolimit City Restart game
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Mental Slot review

Designed by Nolimit City, Mental is a fairly popular video slot among enthusiasts. And while it’s not quite at the top yet, the game has managed to capture the attention of casino regulars. If you’re intrigued by horror-themed slots, Mental ticks all the right boxes. So, make sure to stay till the end for our Mental slot review.

Mental Slot Gameplay

The game is based on a sinister asylum where no one except doctors and nurses dares to venture. And the madness never seems to end in this sepia-themed world. The disturbing audio-visual cues further accentuate the ominous theme.

The symbols include skeleton hand, lungs, heart, brain, eye, patients numbered from 1 to 5, skull wild, scorpion scatter, spider scatter, and dead patient. The standard winning combinations amplify your bet by 0.1-5x. Meanwhile, the wild substitutes all non-winning icons, and the scatters trigger the free spin rounds, as usual.

Mental flaunts five reels in an interesting 3x2x3x2x3 grid. With this novel mechanism, the number of paylines starts at 108. Players can create winning combinations by landing 3, 4, and 5 matching symbols next to each other, starting from the first reel on the left.

The official betting range is between 20p to £70 per spin, while it is possible to find different sizes of bets on various casinos. You can use the auto spin feature for up to 1,000 spins. Mental has an RTP of 96.08%, and Nolimit City claims that the game is extremely volatile. So, players are advised to hold on to their seats.

Mental slot - big win
The animation for big win is fairly disturbing in the Mental slot game

Mental can boost your stakes by up to 66,666-times per spin, and max wins are reported approximately once every 18 million spins. There are four primary features:

  • Fire Frames- 1-13 random positions on the reels are on fire, and every symbol that lands within these are split into two parts.
  • Enhancer Cells – Located at the bottom of reels 2 and 4, these are activated by 4 and 6 Fire Frames, respectively. When active, they trigger one of the following effects – a wild symbol, 1 of 5 patient symbols, the dead patient symbol, xWays, xSplit, and xNudge Wild.
  • Dead Patient – When two dead patient symbols appear across the reels, it triggers a random multiplier that amplifies your stake between x5 and x9999.
  • Mental Transform – When the spider symbol appears on reels 2 or 4, it randomly transforms into xWays, xSplit, Wild symbol, dead patient, or one of the other patient symbols.

Mental Slot Free Spins and Bonus Rounds

Mental slot has three free spin rounds.

Landing three scorpion symbols in a single spin triggers the Autopsy Free Spin feature that offers 8 free spins. Each scorpion symbol in a Fire Frame adds one free spin to the tally. When triggered, up to five Fire Frames can appear for each free spin, and they remain active till the end of the round. Landing a spider symbol during the Autopsy Free Spins upgrades the remainder of the feature to Lobotomy Free Spins.

Lobotomy Free Spins feature is activated when three scorpion symbols and one spider lands in a single spin. During the Lobotomy Free Spins, the Spider symbol is sticky and Mental Transform is awarded for each spin. You get nine free spins, plus an additional spin for every spider or scorpion symbol with Fire Frame. The Dead Multiplier further increases your stake. The highest multiplier from Dead Symbols is collected and applied to any new Patient symbol.

The Mental Free Spins feature is triggered when three scorpions and two spider symbols land on the same spin. You get ten free spins and one additional spin for every spider or scorpion symbol. The sticky spider symbols trigger Mental Transform extras, and the Dead Multipliers keep stacking as a new Dead Patient symbol appears across the reels.

Mental Free spins feature
Top bonus feature of the game, the Mental Free Spins

Players from certain parts of the world can buy a free spin feature called NoLimit Bonus. Each option will cost you between 80x and 1000x your bet, depending on the option that you pick. Your choices are:

  • Autopsy Free Spins (8-11 free spins) – 80 x stake
  • Lobotomy Free Spins (9-13 free spins) – 230 x stake
  • Mental Free Spins (10-15 free spins) - 1,000 x stake
  • Lucky Dip (1 of the 3 features above) - 232 x stake.


Mental slot is a unique one that appeals to people with a specific taste. The design is impressively disturbing, and the gameplay is quite complicated. You should consider playing the demo game to wrap your head around the features before placing a wager.

Author: Niklas Wirtanen | This review was last updated: 20 Sep 2022
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