Mental Online Slot

Published: 7 Sep 2021 | Updated: 25 Mar 2022
Published: 7 Sep 2021 | Updated: 25 Mar 2022
Game Provider
game-name
RTP
96.08%
Volatility
High
Maximum Win
£4,666,620.00
Progressive Jackpots
No
Bonus Feature
Yes
Theme
Horror, Quirky/Weird

Licensing Authorities and Testing Agencies

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100% Welcome Bonus up to £300 + 150 Extra Spins

Slot Setup and Betting Options

  • 31.08.2021 Release Date
  • 5 Reels
  • 3 Rows
  • Mobile Version
  • £0.20 Minimum Bet
  • £70.00 Maximum Bet
  • Win Both ways

Mental Online Slot Review

Go crazy for the Mental online slot at the top-ranked online casinos. Set in an old asylum, it’s a desktop and mobile game that features disturbing images of lobotomies, dead patients, and body parts across 5 reels. It’s not a game for the squeamish, but has many of the ingenious gameplay features that we expect from the minds at Nolimit City.

Splitting symbols, nudging wilds, and a range of free spins rounds are among the mind-blowing extras that come with this high volatility game. There’s an average payback percentage of 96.08% and you can win an insane 66,666x your bet from the Mental slot.

100% Welcome Bonus up to £300 + 150 Extra Spins

How to Play the Mental Slot Machine

Set within the stained tiled walls of the asylum, the grim symbols appear in a 3-2-3-2-3 pattern on your PC, Android, iOS, or Windows mobile. The symbols look like Victorian-era scientific drawings, and include eyes, brains, skeleton hands, and 5 patients in various unpleasant situations. One has a gag-ball in his mouth, one has electrodes wired to his brain, and patient number 4 looks to be dead. Flickering lights and a sinister soundtrack add to the sense of dread.

It’s pretty gruesome, but certainly distinctive. The easy to use controls are the same as those found across the Nolimit City range. Click the ‘$’ symbol on the panel to reveal a bet range of 0.20 to 70.00 for each spin. The arrow button starts an Autoplay feature, while the bolt of lightning on the controls will speed up the gameplay.

Take a look at the payable via a click on the 3 small dots symbol. This reveals a basic 108 different ways to line symbols across the reels for a win. The most valuable is a guy in a mask, and he’s worth 5x your bet when he lands across all 5 reels.

Free Spins & Other Mental Slot Features

The Mental online slot comes packed full of extra features, and while they may seem a little overwhelming at first, once you start to play the game, they all make sense. Fire Frames can appear around anything from 1 to 13 symbol positions, and these split into 2 symbols, one above the other.

If 2 or more Dead Patient symbols land at once they reveal a multiplier from a range of 5x to a colossal 9,999x! Special Enhancer Cells sit below reels 2 and 4. Fire Frames above these will activate a Dead Patient feature, or any of the following –

A golden spider on either reel 2 or 4 awards the Mental Transform feature. Spiders mutate into Xways, xSplit, Wild, or Dead Patient symbols.

Land 3 scorpions to claim 8 Autopsy free spins. Up to 5 Fire Frames appear in each bonus game, and they remain active for any remaining spins. Any 3 scorpions and a spider will trigger the Lobotomy free spins, where spiders are sticky and award the Mental Transform throughout. A Dead Patient collection feature helps you to build huge multipliers during the Lobotomy games, and they only reset when regular patients appear.

If 3 scorpions and 2 spiders appear, you enter the Mental free spins games. Dead Patient multipliers continue to increase throughout this feature. Autopsy and Lobotomy spins can upgrade when spiders appear, and any free games feature ends if you are lucky enough to win 66,666x your bet during the course of the bonus spins.

Slot Features

  • Multipliers
  • Fixed Jackpot
  • Scatters
  • Wild Symbol
  • Free Spins
  • Expanding Reels
  • Stacked Symbols
  • Stacked wilds
  • Multiplier wilds
  • Split symbols wilds
  • Re-Spins
  • Quickspin
  • Nudge Feature
  • Gamble Feature
  • Bonus Buy

100% Welcome Bonus up to £300 + 150 Extra Spins

Mental Maximum Wins, Average Returns, & Volatility

Play with the maximum stake of 70.00 per spin and it’s possible to collect a win of 4,666,620.00 from the Mental online slot. That’s a vast prize, but the odds against actually reaching it are equally huge. This is a high volatility slot, with a long-term payback percentage of 96.08%.

Our Verdict on the Mental Slot

Fans of movies such as Saw, will certainly appreciate the style, but as mentioned earlier, it won’t appeal to everyone. It’s also not a game for inexperienced slots players, as the multiple features will throw you in at the deep end.

But it’s a thrilling game with lots going on, and the potential for some of the biggest payouts from any slot machine we’ve seen. Why not go mad and play the Mental online slot at our recommended online casino sites today?

Top 5 Horror Slots

Software Provider
RTP
92.03%
Volatility
High
Maximum win
£216,000
Applies only to new depositing players. 18+. Minimum deposit: £10. 35x Wagering requirement applies to match up bonus. Spins credited in specific games. Spins expire after 24 hours. Wagering requirement applies to spins. Terms and Conditions apply.
Software Provider
RTP
94.90%
Volatility
Medium
Maximum win
£200,000
18+. New players only. One offer per player. Max bonus bet £5. Offer: 100% bonus match on 1st deposit + bonus spins. Value of bonus & number of spins depend on deposit amount: £20-£100: max £100 bonus + 150 spins on selected games; £101-£200: max £200 bonus + 100 spins on selected games; or £200+: max £300 bonus + 150 spins on eligible NetEnt Games. Winnings from spins credited as bonus and capped at £100. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute to wagering requirement. Bonus funds expire within 30 days; bonus spins within 72hrs. Affordability checks apply. Terms apply. Please gamble responsibly. BeGambleAware.org."
Software Provider
RTP
96.18%
Volatility
Medium
Maximum win
£187,500
Applies only to new depositing players. 18+. Minimum deposit: £10. 35x Wagering requirement applies to match up bonus. Spins credited in specific games. Spins expire after 24 hours. Wagering requirement applies to spins. Terms and Conditions apply.
Software Provider
RTP
96.02%
Volatility
High
Maximum win
£2,777,750
18+. New players only. One offer per player. Max bonus bet £5. Offer: 100% bonus match on 1st deposit + bonus spins. Value of bonus & number of spins depend on deposit amount: £20-£100: max £100 bonus + 150 spins on selected games; £101-£200: max £200 bonus + 100 spins on selected games; or £200+: max £300 bonus + 150 spins on eligible NetEnt Games. Winnings from spins credited as bonus and capped at £100. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute to wagering requirement. Bonus funds expire within 30 days; bonus spins within 72hrs. Affordability checks apply. Terms apply. Please gamble responsibly. BeGambleAware.org."
Software Provider
RTP
96.25%
Volatility
High
Maximum win
£600,000
18+. New players only. Min deposit £20. Max bonus bet £5. Bonus spins on selected game only and must be used within 72hrs. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire within 30 days. Offer is 100% bonus match up to £200 + 50 Bonus spins on your 1st deposit, and 50% bonus match up to £50 on your 2nd deposit. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute towards wagering requirement. Affordability checks apply. Terms apply. Please gamble responsibly. BeGambleAware.org

FAQ


The Mental online slot is themed around an asylum. Various patients appear, along with anatomical drawings of brains, kidneys, and more. Bonus symbols include skulls, spiders, and scorpions, all in gruesome detail.

In the xNudge Wild feature, stacked wild skulls can nudge up or down the reels of the Mental slot until they are fully in view. A multiplier increases by 1x for each step taken, and it applies to any subsequent win created by the wild.

The Mental slots game has 3 free spins bonus rounds. The Autopsy, Lobotomy, and Mental free spins are triggered by combinations of scorpions and spiders. Each round features the potential for huge win multipliers and other treats.

Select online casinos offer downloadable apps for smartphones and tablets. You can then reach their sites via an icon on the screen. Choose our recommended casino apps and you can play the Mental slot, along with many other games at the top mobile sites.

You can play the Mental slot for as much as 70.00 per spin, but you certainly don’t have to wager this much if your budget doesn’t allow. The minimum is only 0.20 and there are plenty of in between options, so you should have no trouble finding a suitable level.

This is a high volatility game where the reels can spin up a few losses before you land a comparatively valuable winning combination. Play the Mental slot and it’s possible to win a massive 66,666x your bet.

Few games are quite as dark as the Mental slot, but a notable exception is the xWays Hoarder xSplit slot from the same developer. It’s set in a post-apocalyptic world and features items that survivors hoard, such as toilet rolls and gas cans.

The Mental slot comes from Nolimit City and joins a wide selection of highly unusual games from this developer. Other weird and wonderful titles in the Nolimit City portfolio include Punk Rocker, Infectious 5, Nitropolis, and the Hoarder game mentioned above.

Nolimit City let the Mental slot loose upon desktop and mobile casinos on 31st August 2021.

Meet Our Slot Tester

Adam Kenny

Senior content operations specialist at gambling.com

With over 12 years of experience in online gaming, Adam has seen, played, reviewed, and tested hundreds of slot games. He is always keeping an eye out for new features, themes, and potential jackpots by testing slot games even before they are released to the market.

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