Mental II Slot – 96.06% RTP, 99,999x Max Win

Quick answer

Mental II is a Nolimit City slot (2025) with 96.06% RTP, very high volatility and a 99,999x max win. It has multipliers, wild symbols and ante bet. An official free demo is available. RTP can vary by casino.

Key specs

RTP: 96.06%
Volatility: Very high
Hit frequency: 31.41% (about 1 in 3.2 spins)
Max win: 99,999x
Grid: 5×3
Released: 25 March 2025
Bet range: $0.20–$100
Jackpot: None

Casinos with Nolimit City games

Velmora150 No-Wager Free Spins Keep every winNo wageringCarries Nolimit City
Play at Velmora (opens in new tab)
18+. New customers. Min dep $20. No wagering. 7 days. 150 spins on Big Bass Bonanza at $0.10. Full T&Cs apply.
Key terms
18+. New customers only. Min deposit $20. No wagering on winnings. Free spins on Big Bass Bonanza at $0.10 per spin. Offer valid 7 days. Full T&Cs apply. Please gamble responsibly.

Check Mental II is in the lobby in your country.

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Part of the Mental series.

Free demo Members

Try Mental II with play money before deciding whether to play for real. Official Nolimit City demos are free for GambGenius members.

Member access — full guide unlocked

How to play Mental II (members only)

This game uses its own win-evaluation system. Check the in-game paytable for exactly how combinations are formed.

Mental II is played on a 5×3 grid.

Set your stake. Choose your total bet per spin between $0.20 and $100. Wins are paid as multiples of this stake.
Check the paytable. Open the game's info screen to see what each symbol pays and the exact rules for this version.
Spin. Each spin's result is decided by a certified random number generator, independent of previous spins.
Optional ante bet. Pay extra per spin to raise the chance of triggering the feature.
Optional bonus buy. Where permitted, pay a fixed price to start the bonus directly.

The full Mental II guide: how winnings work, 6 features and 6 strategy tips

Your stake plan: a $50 budget → about $0.12 a spin (very high volatility)
What 96.06% RTP costs per $100 wagered: $3.94 on average
6 features explained: multipliers, wild symbols, ante bet, split symbols, symbol upgrades and 1 more
Bonus-buy risk breakdown
Stake plans for $20 to $250 budgets, checked against the $0.20 minimum bet
4 RTP versions compared: 96.06%, 95.23%, 94.04%, 92.02%
Strategy tips and a session planner for Mental II

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How winnings work (members only)

What 96.06% RTP costs per $100 wagered, the 99,999x max win at a $1 stake

The top prize is capped at 99,999x your stake. On a $1 spin that is $99,999; on $0.20 it is $19,999.80. When the cap is reached the round usually ends immediately.

Multipliers are applied to wins as they land; in many games several multipliers add together or multiply each other, which is where the largest wins come from.

What 96.06% RTP means

Expected return = stake × 96.06%
Over $100 of total bets, the long-run average loss is $3.94

RTP is a long-run average across millions of spins. Any single session can finish far above or below it, especially on a very high volatility game.

The published hit frequency is 31.41%, meaning roughly one spin in 3.2 returns something — though many of those wins are smaller than the stake.

Features explained (members only)

6 features explained: multipliers, wild symbols, ante bet, split symbols and more

Multipliers

Multipliers increase a win by a set factor, such as 2x or 10x. They can be attached to symbols, applied to a whole spin, or grow during a feature, and are a main driver of the biggest wins.

Wild symbols

Wilds substitute for regular paying symbols to help complete winning combinations. They do not normally replace scatter or bonus symbols.

Ante bet

An optional extra charge on each spin, typically +25%, that increases the chance of triggering the bonus feature.

Split symbols

Symbols that count as two (or more) of the same symbol, boosting the size of combinations.

Symbol upgrades

Lower-paying symbols are transformed into higher-paying ones during a feature.

Bonus buy

Lets you pay a fixed multiple of your stake to enter the bonus feature straight away instead of waiting for it to trigger. It raises variance considerably and is not available in every country (it is banned in the UK).

Strategy tips (members only)

Size your stake to the volatility. Very high volatility means most spins lose and a large share of the return comes from rare big features. Treat it as entertainment with a strict budget and a stake of around 0.5% of your session budget or less. A simple rule: bring at least 400 spins' worth of budget, so a $50 budget suggests a stake of about $0.12.

5 more tips and a session planner

Check which RTP version you're playing. Nolimit City offers this game at 96.06%, 95.23%, 94.04%, 92.02%. Open the game rules at your casino and prefer sites running the 96.06% version.
Treat bonus buys as high-risk. Buying the feature concentrates your budget into a few large-variance rounds. Many results return less than the price paid. Read our bonus buy guide first.
Understand the ante bet. It costs more per spin to trigger features more often; it does not change the game into a better bet.
Bonus wagering: at 96.06% RTP, clearing $1,000 of wagering costs about $39.40 on average. Check the bonus terms, as some casinos exclude specific games. Run your numbers in the wagering calculator.
Set limits before you spin. Decide your loss limit and session time in advance and stop when you reach either. No pattern or betting system changes the outcome of a spin.

More on this in slot RTP and volatility explained and bankroll management.

Does it fit your budget? (members only)

Stake plans for $20 to $250 budgets, checked against the $0.20 minimum bet

For very high volatility we suggest a budget of at least 400 spins. This is what that means for Mental II (bets from $0.20 up to a maximum bet of $100).

Stake plans for Mental II
Budget	Stake a spin	Bet range	Average cost of 400 spins
$20	$0.05	Below the $0.20 minimum bet	$0.79
$50	$0.12	Below the $0.20 minimum bet	$1.97
$100	$0.25	Fits	$3.94
$250	$0.62	Fits	$9.85

Averages only: a short session can end far above or below them. Set a loss limit before you play.

RTP versions (members only)

4 RTP versions compared: 96.06%, 95.23%, 94.04%, 92.02%

Nolimit City supplies Mental II in 4 RTP versions and each casino chooses which one to run. Over $1,000 of bets, the 92.02% version costs about $40.40 more on average than the 96.06% version.

RTP versions of Mental II
Version	Average cost per $100 wagered	Extra vs best
96.06% (best)	$3.94	—
95.23%	$4.77	+$0.83
94.04%	$5.96	+$2.02
92.02%	$7.98	+$4.04

Open the game's rules or info screen at your casino to see which version it runs.

Seen a different version at a casino? How member RTP reports work

Questions

Frequently asked questions

Who makes Mental II?

Mental II is developed by Nolimit City and was released in 2025.

What is the RTP of Mental II?

The default RTP of Mental II is 96.06%. Nolimit City also supplies versions at 95.23%, 94.04%, 92.02%, so check the game's info screen at your casino.

Is Mental II high volatility?

Mental II is rated very high volatility. Very high volatility means most spins lose and a large share of the return comes from rare big features.

What is the max win on Mental II?

The maximum win on Mental II is 99,999x your stake, which is $99,999 on a $1 spin.

Can I play Mental II for free?

Yes. GambGenius members can play the official Nolimit City demo of Mental II free on this page. It uses play money only, so demo wins can't be withdrawn, and it is for players aged 18 and over.

Does Mental II have a bonus buy?

Yes. Mental II includes a bonus buy option, although it is unavailable in some countries such as the UK.

Where can I play Mental II?

Velmora carries Nolimit City games. Check Mental II is in the lobby in your country before you sign up. 18+ · New customers · T&Cs apply. Availability varies by country.