Mental 2 slot review

Mental 2 slot specifications

Mental 2 comes from Nolimit City and follows the 2021 original, Mental. The core figures come from our checked data, and the feature detail below comes from the studio's launch showcase published by Gaming Intelligence in March 2025 (opens in a new tab).

The 108 ways are simple arithmetic: 3 × 2 × 3 × 2 × 3 = 108. Because wins count from both the left and the right, a combination can form from either end of the grid. Our guide to ways-to-win slots explains the counting method.

How the features work in Mental 2

Mental 2 splits its features between the base game and a three-level bonus. In ordinary paid spins the standout is Fire Reels. The bonus itself is a ladder of three free-spin modes: Bloodletting, Surgery and ExperiMENTAL.

Fire Reels in the base game

When a reel catches fire, the symbols landing on it split into more than one. More symbols on the screen means more combinations across the reels, so a burning reel can lift the number of ways on that spin well above the standard 108. Our Fire Frames section further down gives the full breakdown.

Three modes, one after another

The bonus isn't a choice of three rounds. As the free spins table later on this page shows, the modes form a ladder:

1. Bloodletting Spins is the entry mode, reached through ordinary play.
2. Surgery Spins is the middle level, reached from inside Bloodletting.
3. ExperiMENTAL Spins is the top level and the hardest to reach.

The upper modes are harder to reach, which is how high-volatility games tend to hold back part of their return. A session can include bonuses that never get past Bloodletting, and a higher mode can still pay modestly. The table also lists the scatter conditions and what changes at each level.

Since feature buys aren't offered to British players, all three modes come only from normal spins in the UK.

Mental 2 against the original Mental

The sequel keeps the same reel shape and base ways count, and lifts the ceiling by half.

The 0.02-point RTP difference is 2p per £100 staked, which is negligible. The real changes are the both-ways pays, the Fire Reels system and the three-stage bonus.

Fire Frames, Fire Reels and Enhancer Cells in Mental 2

According to the launch showcase, between 1 and 13 reel positions in the main game can become Fire Frames, and a symbol landing in a Fire Frame splits into two. Between 1 and 5 whole reels can become Fire Reels, where a landing symbol splits into three. Splitting adds symbols to the grid, which raises the number of ways on that spin. Our split symbols page explains why.

Enhancer Cells sit at the bottom of reels 2, 3 and 4 and are switched on by Fire Frames:

Each active cell reveals a wild, an xSplit, an xNudge wild, one of five Patient symbols or an xWays symbol.

xWays, xSplit, xNudge and xHole in the Mental 2 slot

Nolimit City's xWays and xNudge family of mechanics does much of the work. The showcase describes them in this game as follows:

• xWays reveals three symbols of the same kind and makes the reel taller; several xWays on one spin all reveal the same symbol.
• xSplit splits one symbol on the other reels, doubling its count, and turns itself into two wilds.
• xNudge wilds nudge until fully visible, adding 1 to their multiplier for each step; multipliers from several such wilds are added together.
• xHole triggers when it lands in a Fire Frame or Fire Reel in the second position of reel 3, pulls in paying symbols and wilds and scatters them to random positions with a 2x, 4x or 8x multiplier, then becomes a wild.
• xMental, landing in a Fire Frame or Fire Reel, gives an extra spin in which every position has a Fire Frame.

Dead Patient symbols activate when two or more land, and one Patient symbol then reveals a random multiplier from a set running 5x, 10x, 15x, 30x, 50x, 100x, 200x, 500x, 1,000x or 9,999x. The showcase doesn't publish how often each value appears, so no probability can be given.

Mental 2 free spins: Bloodletting, Surgery and ExperiMENTAL

The bonus runs as a ladder of three free spins modes, each reached from the one below.

Each step up needs extra scatters to land during the round, so the upper modes are naturally harder to reach, and much of the game's volatility sits in them. Reaching Surgery or ExperiMENTAL doesn't promise a large win; it changes the range of what is possible.

Mental 2 RTP and what high volatility means

At the top setting, the house edge is 3.94%, or £3.94 per £100 staked on average. Lower RTP versions exist, so check the rules screen. The volatility label matters as much as the RTP here: with a 99,999x ceiling and multipliers up to 9,999x, a large part of the return sits in very rare results, so most sessions end below the average. Our high-volatility slots page compares similar games.

What £20 means on Mental 2

The right-hand column grabs attention, but the middle columns describe what usually happens. In a game this volatile, twenty £1 spins can easily pass without Fire Frames doing anything memorable, let alone Bloodletting Spins. Lower stakes give the features more chances for the same average cost. See how long £20 lasts on a slot for more.

The 99,999x Mental 2 max win

According to the showcase, the max win of 99,999 times the base bet is triggered by landing an xGod symbol on each reel. At the UK caps that is £199,998 at £2 and £499,995 at £5. It's 33,333x higher than the original's 66,666x. The help screen explains exactly how the cap ends a round. Our explainer on max win caps covers the general rules.

Playing Mental 2 online in the UK

UK online slot stakes are capped at £5 per spin from age 25 and £2 for ages 18 to 24, under the Gambling Commission's online slot stake limits. The Commission's RTS 14 responsible design standard (opens in a new tab) requires a minimum 2.5 seconds per spin and bans turbo, slam-stop and celebrating returns at or below the stake; autoplay is banned too.

Some Nolimit City games elsewhere offer paid routes into features. On UK sites, since a Gambling Commission warning in January 2020, feature buy-ins are not offered to British players, so Bloodletting Spins come only from Cognitive Scatters in normal play. If launch material mentions optional bet modes, check the UK help screen to see what's actually available.

How to play Mental 2

1. Register at a UK-licensed casino and complete age and identity verification.
2. Choose a deposit limit when prompted, before money goes in.
3. Open Mental 2 and read the rules, checking the RTP version and the Fire Frame and scatter rules.
4. Choose a stake within your age-based cap; small stakes stretch a budget.
5. Spin one press at a time and let features resolve.
6. Stop at your planned limit and take a break if you feel the urge to chase a bonus.

Where to play the Mental 2 slot

Our partners' welcome spins are on named or selected slots, and none is confirmed for Mental 2. Look in each casino's game lobby for the title. 18+ and terms apply.

• PlayOJO: first deposit of at least £10 brings 80 free spins on Big Bass Bonanza at 10p each, no wagering, winnings paid as cash; new UK customers excluding Northern Ireland.
• Coral: deposit and bet £10 on slots for 100 free spins on selected games, 10p each, 48 hours to accept and 7 days to use, no wagering on winnings; PayPal, Skrill, Neteller, Paysafe, prepaid cards and some debit cards are excluded.
• Ladbrokes: play £10 on slots for 50 free spins a day for 10 days (500 maximum), 10p each on selected games, claim by 23:59 daily, valid 7 days, no wagering; PayPal, Paysafe, Neteller, Skrill and prepaid cards don't qualify.

If you are worried about your gambling, GamCare (opens in a new tab) and the National Gambling Helpline on 0808 8020 133 offer free, confidential support around the clock.

18+. Every casino game has a built-in house edge, so over time you should expect to lose what you stake. Set a budget before you play and stop when it’s gone: safer gambling tools and support. Free, confidential help: National Gambling Helpline 0808 8020 133.