Nolimit City · 2021 · measured RTP 96.7% · tested 2026-09-30
Mental
Eighteen of the 20 biggest base-game wins in Mental's first 10,000 demo spins came from xSplit rounds; pooled with a second run, 20,000 rounds gave 96.7% RTP, near the declared 96.08%.
In numbers: the lab's RTP test on the official demo server measured 96.7% against 96.08% declared over 20,000 logged rounds in 2 runs; 34.0% of rounds paid; a natural bonus landed once per 185 rounds (108 in total) and a bonus round paid a median 50.6x the stake, mean 67.7x, trigger spin included; 100 bonus buys at 80x returned 0.98x of their price on average, 77% of them below the price; the biggest round paid 1,125.0x; the longest dry run was 22 spins.
Same series: Mental II — tested separately
Mental demo
United States·available at Cafe Casino
Same reels, real payouts
Cafe Casino runs the same Mental with the same math and adds a welcome bonus for players from the United States:
300% up to $2,000 + 150 FS 18+ · T&Cs apply · the demo stays free
Test card
20,000 spins · EUR 1.00 bet · every request logged
| Spins | 20,000 · 2 runs |
| Bet | EUR 1.00 |
| RTP declared | 96.08% |
| RTP measured | 96.65% (approximate 95% CI 81.1–112.2) |
| Hit frequency | 34% · every 2.94 |
| Dead streak max / avg | 22 / 2.95 |
| Median hit | 0.55x |
| Max win (no bonus round) | 1,125.0x · run 2, round 390 |
| Free spins, natural | 108 · 5.4 bHz · every 185.2 spins · mean bonus round payout 67.7x stake |
| Balance start → end | 10,000 → 9,331 |
- 012026-09-2710,000 rounds · 50 buysfiles & checksums ↓83.71%RTP5 files · SHA-256 ↓
- 022026-09-3010,000 rounds · 50 buysfiles & checksums ↓109.60%RTP5 files · SHA-256 ↓
each run keeps its own spin log, CSV and raw server journal with checksums; the figures on this card combine all runs
Bonus buy lab
100 buys × 80x · EUR 80 each
mean 0.98x · median 0.622× price (EUR 49.75) · 77 of 100 below price · best 11.68x · worst 0.08x
| Spins per bonus (avg / min–max) | 8.6 / 8–11 |
| Retriggered | 45% |
| Bonuses that paid nothing | 0% |
Autopsy Freespins start with 8 spins and get one more for every Scorpion that lands inside a Fire Frame on the trigger; a Spider during the feature upgrades it to Lobotomy with +1 spin, and an upgrade to Mental adds +2 from Autopsy or +1 from Lobotomy. Bought features that ran longer than 8 spins make up the retrigger figure: 21 of 50 in run one, four of them upgraded to Lobotomy, and 24 of 50 in run two, eight upgraded. Among the natural features 19 of 49 and then 26 of 59 ran longer than 8 spins, and round 5846 of run two was the only one to reach Mental Freespins.
- Spent
- EUR 8,000100 × EUR 80
- Returned
- EUR 7,866.7098.33% · approximate 95% CI 70–126%
- Net
- −EUR 133.30−1.7 buys
- Break-even or better
- 23 / 10023%
- Paid 2× price or more
- 9 / 1009%
- Price in base spins
- 80natural trigger every ~185 spins
One ticket equals 80 ordinary stakes. Natural bonuses occurred once per 185 ordinary rounds in this sample. Stakes multiplied by this interval measure gross wagering, not the net cost of obtaining a bonus. Purchase returns above include the complete purchased round and are divided by the ticket price.
Risk profile
how much bankroll the 2 runs in sequence needed
| 50 bets | bust at spin 121 |
| 100 bets | bust at spin 565 |
| 200 bets | bust at spin 841 |
The runs are played back to back as one series, one bet size. A different session can bust earlier or never; treat this as a measured example, not a rule.
How it plays
21 rules screens from the game
Five reels in a 3-2-3-2-3 layout give 108 ways by default, and a way pays left to right on adjacent reels. Patient-1 is the top symbol at 5x the bet for five, the organ symbols pay between 0.10x and 1.25x. Every base spin puts Fire Frames on 1 to 13 positions, and a symbol landing in a frame splits into two.
Under reels 2 and 4 sit Enhancer Cells that open after 4 and 6 Fire Frames and reveal a Patient, a Dead Patient, xWays, xSplit, a Wild or an xNudge Wild. xWays turns into three symbols of one kind and stretches the reel, while xSplit splits one symbol on each reel into two and becomes two Wilds itself. Two Dead Patient symbols reveal a Patient carrying a multiplier from x5 to x9999 that counts as that many copies on its reel.
A Spider on reel 2 or 4 triggers Mental Transform into xWays, xSplit, a Dead Patient, a Wild or a Patient, and an xNudge Wild adds +1 to its multiplier for every step it nudges. Three Scorpions, a symbol limited to reels one, three and five, start 8 Autopsy Freespins, +1 for each Scorpion inside a Fire Frame, and during the feature up to five new Fire Frames per spin stay until the end.
A Spider during Autopsy upgrades the rest to Lobotomy Freespins (+1 spin), where the Spider sticks, Mental Transform runs every spin and Dead multipliers are collected and handed to matching Patients. Two Spiders, or a new one during Lobotomy, lead to Mental Freespins, where a collected multiplier keeps its count of Patients after every transfer instead of losing one. The Nolimit Bonus menu sells Autopsy at 80x, Lobotomy at 230x, Mental at 1000x and a Lucky Draw at 232x; the rules list 96.08% RTP, a 66,666x cap simulated at 1 in 18,000,000 rounds, and a demo stake of EUR 0.20 to EUR 70.
Free spins
Scatter symbol
Wild symbol
Multiplier
Expanding symbol
Sticky symbol
Retrigger
Bonus buy
Bet range EUR 0.20 – 70 per spin · payouts read from the game's paytable at bet EUR 1.00
Gallery
7 frames from the demo session
Verdict
Two Dead Patients, one 1,125x spin
Mental's two EUR 1 demo runs sit 26 points apart, 83.71% and 109.60%, 96.65% pooled over 20,000 spins and 669.1 bets short of the declared 96.08%, and the second run's surplus has an address: round 390, where two Dead Patients revealed the same Patient at x50 each and a third copy on the middle reel paid 2,500 ways for EUR 1,125, a base spin worth more than any feature in 20,000 spins. Dead Patient activations were as frequent as before, 513 and then 506 in 10,000 spins, but their rounds took 6.56% of base-game money the first time and 24.19% the second, most of it that one spin; xSplit rounds, 192 and then 196, took 30.38% and 34.0% at 8.027x and 12.066x apiece, and supplied 18 and then 15 of each run's 20 biggest base wins.
Natural features came 108 times, 49 and then 59, one per 185.2 spins or 5.4 bHz; adding the trigger spin to the free spins, they paid 67.69x the stake on average, 50.55x at the median, 37.8% of everything returned; 17 cleared 100x, four ended below 20x, and run two's round 5846 was the first feature on this page to reach Mental Freespins, 274.05x after an upgrade from Autopsy through Lobotomy. Eleven features in all finished in Lobotomy, four in run one and seven in run two, averaging 91.36x and 89.24x against 65.25x and 60.99x for those that stayed in Autopsy; the largest features were 280.4x on round 9533 of run one and 337.5x on round 4769 of run two, and the longest waits 901 and 1,011 spins.
The 80x Autopsy ticket returned 0.9833x of price over 100 buys, 0.9505x and then 1.0162x, with 77 tickets short of their price, a EUR 49.75 median and three tickets past 5x, EUR 469.40 and EUR 448.60 in run one and EUR 934.70 on ticket 49 of run two; the 12 bought features that upgraded to Lobotomy averaged 71.20x in run one and 171.76x in run two. Wins came on 33.75% and 34.24% of spins at a 0.55x median, no dry stretch passed 22, and the balance ran opposite ways: run one closed 1,628.8 bets down after a 1,844.3-bet low on spin 8967, run two dipped no deeper than 94 bets under its start and closed 959.6 up, so the pooled ledger's low remains run one's.
- A 1,125x base spin on round 390 of run two, two Dead Patients at x50 on one Patient
- Mental Freespins finally appeared, on round 5846 of run two, for 274.05x
- Seventeen of 108 features cleared 100x, led by 337.5x on round 4769 of run two
- EUR 934.70 on ticket 49 of run two, 11.68x the EUR 80 price, after ten spins
- Seventy-seven of 100 Autopsy tickets came back below their 80x price, the worst EUR 6.30
- Eighty-seven of 100 Autopsy tickets ended after 8 or 9 spins
- Free spins medians fell from 56.9x in run one to 39.6x in run two
- Mental Freespins came once in 208 features, natural and bought, across both runs
Run 01·2026-09-27·83.71%
The 192 spins with an xSplit, 1.92% of the series, paid EUR 1,541.20 of the EUR 5,072.30 earned outside free spins, 30.38%, and averaged 8.027x the stake against 0.360x for every other spin. Eighteen of the twenty biggest base wins had a split, the largest 83.6x at round 7802.
Natural features came 49 times, once per 204.1 spins, in a series that returned 83.71% against the declared 96.08%. With their trigger spins they averaged 67.38x the stake, with a median of 56.9x. Only four reached Lobotomy, three by upgrade and one straight from the base game, and none got to Mental Freespins; those four averaged 91.36x against 65.25x for the 45 that stayed in Autopsy.
Two tickets stood out among fifty Autopsy purchases at EUR 80, EUR 469.40 and EUR 448.60, while the median ticket returned EUR 53.00 and 40 of 50 fell short of the price; on average the fifty returned 0.9505x. The four tickets that upgraded to Lobotomy averaged 71.20x the stake in free spins wins, against 76.46x for the 46 that stayed in Autopsy.
Run 02·2026-09-30·109.60%
Two Dead Patients on round 390 revealed the same Patient, each carrying x50, and with the same symbol also on the middle reel it paid 2,500 ways at 0.45x: EUR 1,125 from a single base spin, 1,125x, more than any feature on this page and 10.3% of the run's return. Round 4627 added 456.3x, an xSplit round in which the lowest organ symbol paid 432 ways across all five reels, and rounds 6374 and 8514 passed 100x with a split as well; the 196 xSplit spins, 1.96% of the series, took 34.0% of the base-game money at 12.066x apiece against 0.468x for the rest, and the 506 Dead Patient activations, 5.06%, took 24.19%, EUR 1,682.10, of which round 390 was most.
Fifty-nine features came one per 169.5 spins, 5.9 bHz, and paid EUR 4,009.10 with their trigger spins, 36.6% of the return, 67.95x on average and 39.6x at the median; ten of them cleared 100x while four stayed under 20x, and round 5846 went where no feature on this page had gone, from Autopsy through Lobotomy into Mental Freespins for 274.05x. Round 4769 was the largest at 337.5x over ten spins in Autopsy, seven features finished in Lobotomy and averaged 89.24x against 60.99x for the 51 that stayed in Autopsy, 26 ran past eight spins; the longest wait, 1,011 spins, followed round 8528. Fifty Autopsy tickets at EUR 80 returned EUR 4,064.80, 1.0162x of price, on the strength of ticket 49, upgraded to Lobotomy, EUR 934.70 or 11.68x from ten spins; the other 49 returned 0.7985x, 37 tickets fell short of the price, the median paid EUR 47.40 and ticket 13 EUR 6.30, while the eight tickets upgraded to Lobotomy averaged 171.76x against 64.06x for the 42 that stayed in Autopsy.
Hits arrived on 34.24% of spins, 0.55x at the median; 6,576 spins paid nothing, and 22 spins from round 6976 made the longest blank stretch. The balance was below its start only until spin 229, dipping 94 bets down on spin 218, then climbed to 1,714 bets up on spin 4864 and closed 959.6 ahead, 109.60% of EUR 10,000 at EUR 1; the 100- and 200-bet bankrolls survived the whole run while 50 bets went on spin 148, and the 2,000-spin blocks returned 151.5%, 85.4%, 141.5%, 89.4% and 80.2%.
Test record
2 runs · 20,000 rounds · 100 buys · open data · closed rig
This game has been through 2 separate test runs on the official demo server, each a fresh session of 10,000 rounds at a fixed bet. Every figure on this page combines the runs into one sample, as if they were one long session; the record below keeps each run apart, with its own numbers and its own downloadable log.
- 20,000rounds, all runs
- 34%rounds that paid
- 1,125xbiggest round
- 1 / 185natural bonus rate
- 0.98xmean of 100 buys
- 22longest dry streak
01run Run 012026-09-27 measured return83.71%-12.4 pts vs declared
- 95% band
- 71.3–96.1%
- rounds that paid
- 34%
- biggest round
- 280x · round 9,533
- longest dry streak
- 19
- natural bonuses
- 49 · one per 204 rounds
- bonus buys
- mean 0.95x · median 0.663x · 80% below price
- balance start → end
- 10,000 → 8,371
- deepest drawdown
- 1,922x
02run Run 022026-09-30 lab note measured return109.60%+13.5 pts vs declared
- 95% band
- 81.1–138.1%
- rounds that paid
- 34%
- biggest round
- 1,125x · round 390
- longest dry streak
- 22
- natural bonuses
- 59 · one per 170 rounds
- bonus buys
- mean 1.02x · median 0.593x · 74% below price
- balance start → end
- 10,000 → 10,960
- deepest drawdown
- 795x
Mental's second run, 30 September, returned 109.60% after 83.71% on 27 September, 96.65% pooled for the 20,000 EUR 1 spins, the game's declared figure 96.08%. Round 390 paid 1,125x from two x50 Dead Patients in the base game, round 5846 brought the page's first Mental Freespins, features came 59 times against 49, and the Autopsy tickets returned 1.0162x of price after 0.9505x, ticket 49 at 11.68x.
2 test runs combined into one sample (2026-09-27, 2026-09-30): 20000 ordinary paid rounds, including naturally triggered features, at a fixed EUR 1.0 bet; 100 bonus buys at 80.0 each (80.0x) on the official Nolimit City demo server (jurisdiction DEFAULT, RTP profile 96.08%); every request and response logged.
The test rig plays the official demo build over the network and records every server round: bet, win, intermediate steps (cascades, respins), free spins, collect. Screenshots and video were captured in a separate browser session and are not part of the statistical samples. The text was read against the log by an editor before publication. How we test → One test, step by step →
FAQ
7 questions · answered from the log
Which of 83.71% and 109.60% is closer to Mental's real level?
Neither on its own: pooled, the two runs' 20,000 spins at EUR 1 give 96.65% against the declared 96.08%, and round 390's 1,125x alone is 10.3% of run two's return. Natural features, trigger spins included, supplied 39.4% and 36.6% of what each run paid back, and the base game peaked at 83.6x and then 1,125x.
What produced 1,125x on round 390?
Two Dead Patients landed on the first two reels and both revealed the fourth patient symbol carrying x50, which counts as 50 copies each; a plain copy on the third reel completed a three-reel win on 2,500 ways at 0.45x, EUR 1,125 from a EUR 1 spin. No Enhancer Cell was open and no xSplit was involved; in the whole run the x50 value was revealed 45 times and x500 six times.
Is xSplit still behind the biggest base wins?
Yes, apart from round 390: xSplit rounds were 4 of the 5 and 15 of the 20 largest base wins of run two, after 18 of 20 in run one, and averaged 12.066x against 0.468x for other spins. Round 4627 was the best of them at 456.3x, where the lowest organ symbol paid 432 ways across all five reels.
Did Mental Freespins ever show up?
Yes. Lobotomy upgraded on to Mental Freespins once in 208 features across both runs, on round 5846 of run two, which had opened as Autopsy and paid 274.05x over ten spins. Natural features finished in Lobotomy eleven times and bought Autopsy tickets upgraded to it twelve times, and run two's eight upgraded tickets averaged 171.76x.
Over 100 tickets, does the 80x Autopsy buy pay for itself?
Almost: EUR 7,866.70 back for EUR 8,000, 0.9833x of price, 0.9505x in run one and 1.0162x in run two. The median ticket paid EUR 49.75, 77 of 100 came back below the price, nine passed 2x and three passed 5x, ticket 49 of run two at EUR 934.70 the best; the other 99 tickets returned 0.8753x between them.
Where were the longest gaps between features?
A 1,011-spin gap in run two, from round 8528 to 9540, and 901 spins in run one. Over 20,000 spins the 108 features came one per 185.2 on average, 5.4 bHz, 49 in the first run and 59 in the second, and run two's first feature arrived on round 65.
Do the Dead Patient multipliers matter outside round 390?
No, Dead Patient spins mattered little: the feature fired on 513 and then 506 base spins, about 5% each time, revealing x5 to x500, and its rounds paid 6.56% of run one's base-game money. In run two the share rose to 24.19%, EUR 1,682.10, but EUR 1,125 of that was round 390; the x500 value came up twice in run one and six times in run two.
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- spins20,000
- bet1.00
- result-669x
- RTP measured96.7%
- bonuses108
- max win, no bonus1,125.0x
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