- Must be 18+ to participate. T&Cs apply. Void in ID, MI, RI, TN and WA.
Nolimit City – because apparently, sanity is optional in game development – has cemented itself as the slot world’s reigning mad scientist. This is the studio that looked at conventional slot design, laughed hysterically, and then set it on fire. And now, they’ve dropped Mental, a slot so disturbingly deranged it makes the rest of their catalogue look like bedtime stories.
As the name unsubtly implies, Mental is completely unhinged. We’re talking bizarre paylines, a theme ripped from your worst nightmares, and a rogue’s gallery of characters who look like they’ve crawled out of an asylum’s reject pile. And naturally, lurking behind all this chaos is the chance to win hundreds of thousands of times your bet – because what’s horror without a little temptation?
You can play Mental for free or risk your cash at any Nolimit City-powered casino. But fair warning: once you switch to real money, things go from quirky to completely, irreversibly, batshit mental.


Mental isn’t just a 5-reel slot – it’s a full-blown descent into madness. Forget your typical grid layout; here, the reels shift in height like some deranged game of Tetris. It’s got that 2x3x3x3x2 setup we’ve seen before in Tombstone, but this time everything’s soaked in the blood-smeared sepia tones of a psychiatric horror film. Think One Flew Over the Cuckoo’s Nest, if it was directed by Clive Barker.
Visually, it’s absolutely unhinged. Set in a decrepit asylum, the game introduces you to a cast of unsettling patients, including a Hannibal Lecter knockoff who pays 5x your stake for a five-of-a-kind – because who wouldn’t want to be rewarded by a cannibal in a muzzle? There’s also a skeleton hand, a set of disembodied lungs (charming), and a soundtrack that sounds like it’s whispering directly into your frontal lobe. You won’t just play Mental – you’ll commit yourself to it.
The bet range spans from $0.20 to $70 per spin, making it inclusive for both casual masochists and high-rolling lunatics. The RTP sits at a respectable 96.08%, but don’t let that fool you – this is a volatility monster, the kind of slot that either ruins your day or rewrites your retirement plan. With all the chaos aligned, the game can cough up a max win of 66,666x your stake. Yes, that number isn’t a coincidence.
Gameplay-wise, this slot is packed tighter than a padded cell. First up, there’s the Fire Frames feature – each spin can randomly ignite 1 to 13 reel positions, splitting symbols with the xSplit mechanic. Land 4 or 6 of these, and you activate Enhancer Cells at the base of reels 2 and 4. These cells reveal modifiers like Wilds, xWays, xNudge Wilds, and even Dead Patients carrying multipliers up to 9,999x. Just two Dead Patient symbols are enough to trigger massive payouts.
Then there’s the spider. No, not a metaphorical one – an actual symbol. Land it on reels 2 and 4 to trigger Mental Transform, which mutates into one of several high-powered symbols, including Dead Patients, Wilds, or xWays. It’s disgusting. It’s brilliant. It’s Nolimit City at their most psychotically creative.
Here are all the free spins bonuses you'll come across when playing the Mental slot.
Land 3 Scorpion Scatters on the same spin, and you’ll get 8 free games to start with. Any extra Scorpion in a Fire Frame will add an extra spin to your tally. Up to 5 Fire Frames are added to each reel during the Free Spins Round, and they don’t reset between free spins. The Autopsy Free Spins can be upgraded to Lobotomy or Mental Free Spins, which offer even higher rewards.
Nolimit City has a habit of dropping slot games that make you question your life choices – and Mental is no exception. In fact, this might be one of their finest (and most disturbing) creations to date. It’s not just creepy – it’s institutional creepy, like something you’d find scribbled on the padded walls of a forgotten asylum.
The gameplay? Twisted brilliance. A cocktail of unhinged features and spine-prickling bonus rounds that are equal parts thrilling and terrifying. But here’s the kicker: if the slot doesn’t fry your nerves, it might just fry the casino’s bankroll instead.
Bottom line – Mental isn’t just a slot. It’s a psychological test wrapped in a horror show, dressed up as a jackpot machine. Try it at any of the best online casinos, and maybe, just maybe, it’ll throw a bag of cash at you before it breaks your soul.
Karolis Matulis is an SEO Content Editor at Casinos.com with more than 6 years of experience in the online gambling industry. Karolis has written and edited dozens of slot and casino reviews and has played and tested thousands of online slot games. So if there's a new slot title coming out soon, you better know it – Karolis has already tried it.
Read Full BioNeed expert help? Ask a question and one of our in-house experts will get back to you...


