Skip to content
113tests1,810,000spins 18+
Folsom Prison — Slotester Lab test cover
10,000 SPINS 50 BUYS DEMO SERVER

Nolimit City · 2022 · tested 2026-10-03

Folsom Prison

One free spin in Folsom Prison's demo paid EUR 9,660 after a Chair upgrade, more than half of everything the 10,000-round RTP test returned.

Test card

10,000 spins · EUR 1.00 bet · every request logged
Spins10,000
BetEUR 1.00
RTP declared96.07%
RTP measured181.23% (approximate 95% CI -9.8–372.2)
Hit frequency23% · every 4.28
Dead streak max / avg32 / 4.27
Median hit0.60x
Max win (base game)160.0x · spin 1130
Free spins, natural63 · 6.3 bHz · every 158.7 spins · mean FS-only payout 199.1x stake
Balance start → end10,000 → 18,123
Balance in bets over the base series
Win distribution, x bet
test logs · 1 run · every request loggedtest record ↓
  1. 012026-10-0310,000 rounds · 50 buysfiles & checksums ↓181.23%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

Play Folsom Prison demo

NOLIMIT CITY · official demo · same math as real play
Best offer for players from United States Folsom Prison available at Cafe Casino
Play for real money
Folsom Prison demo game field
Exclusive bonus at Cafe Casino · for players from the United States 300% up to $2,000 + 150 FS
Get bonus
Free demo · no registration · plays on the provider's official server · 18+ Responsible gambling

Bonus buy lab

50 buys × 68x · EUR 68 each
Results, x price (amber = below price)
  1. buy 011.32x
  2. buy 020.38x
  3. buy 034.71x
  4. buy 040.15x
  5. buy 050.31x
  6. buy 060.35x
  7. buy 070.65x
  8. buy 080.44x
  9. buy 090.28x
  10. buy 100.40x
  11. buy 110.51x
  12. buy 120.27x
  13. buy 130.18x
  14. buy 140.39x
  15. buy 150.93x
  16. buy 160.46x
  17. buy 170.31x
  18. buy 180.17x
  19. buy 190.68x
  20. buy 2015.60x
  21. buy 211.15x
  22. buy 220.40x
  23. buy 231.11x
  24. buy 240.38x
  25. buy 250.57x
  26. buy 261.75x
  27. buy 270.30x
  28. buy 280.14x
  29. buy 290.23x
  30. buy 300.24x
  31. buy 311.13x
  32. buy 320.15x
  33. buy 330.28x
  34. buy 340.79x
  35. buy 350.43x
  36. buy 360.56x
  37. buy 371.08x
  38. buy 380.34x
  39. buy 390.26x
  40. buy 400.42x
  41. buy 410.33x
  42. buy 420.09x
  43. buy 430.59x
  44. buy 440.68x
  45. buy 450.41x
  46. buy 460.23x
  47. buy 470.41x
  48. buy 480.68x
  49. buy 490.49x
  50. buy 500.24x

mean 0.89x · median 0.406× price (EUR 27.60) · 42 of 50 below price · best 15.60x · worst 0.09x

Free spins anatomy
Spins per bonus (avg / min–max)8.1 / 8–9
Retriggered0%
Bonuses that paid nothing0%

A reel-five Scatter extends Walk The Line by two spins, or three if split, and upgrades the remaining spins to The Chair. Only round 6333 received such an addition in this run. Split Scatters at entry instead produced one ten-spin and three nine-spin natural starts, plus four nine-spin purchases; those bigger starting awards are not counted as extensions.

A EUR 68 Walk The Line ticket returns EUR 85.80 across eight free spins · Recorded in a separate browser session, outside the statistical samples.
Buy ledger
Spent
EUR 3,40050 × EUR 68
Returned
EUR 3,015.2088.68% · approximate 95% CI 27–150%
Net
−EUR 384.80−5.7 buys
Break-even or better
8 / 5016%
Paid 2× price or more
2 / 504%
Price in base spins
68natural trigger every ~159 spins

One ticket equals 68 ordinary stakes. Natural bonuses occurred once per 159 paid 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 this run needed
1,561xmax drawdown, in bets (by spin 6332)
-1,561xlowest point vs start
32longest dead streak, spins
Bankroll survival in this run
50 betsbust at spin 84
100 betsbust at spin 186
200 betsbust at spin 332

One run, 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

Bars initially cover most of the field, leaving two positions on each of the first four reels and none on the fifth: 16 ways. Wins require matching symbols on neighboring reels, starting at reel one and continuing across at least three. Wilds, Scatters, xWays and xSplit landing on an open position unlock the nearest cell above and below themselves, while Cockroaches open the cells they visit. The physical field can reach 4-6-6-6-4 positions, giving 3,456 ways before symbols divide.

An xWays reveal puts two to four copies of one paying symbol into a position. xSplit doubles the symbols across its entire row and becomes two Wilds itself; splitting a Scatter adds one starting free spin, while splitting a Nest adds one to its multiplier. Each Cockroach contributes its level to the positions along its route, and simultaneous Cockroach visits turn the affected cell into a Wild. Those position values combine with symbol splits when the game counts paying ways.

Walk The Line supplies at least one Cockroach per spin, starting with at least eight spins after a three-Scatter trigger; four Scatters award The Chair with at least eight spins and a minimum of three Cockroaches per spin. Walk The Line starts each spin with a 2-4-4-4-2 field, whereas The Chair starts at 4-4-4-4-4. A Nest visited during either feature upgrades that Cockroach through levels 1, 2, 3 and 10, and a two-egg Nest can also clone one extra Cockroach once per bonus mode. These levels persist for the rest of the bonus.

During Walk The Line, a Scatter on reel five adds two spins, or three when split, and changes the remaining spins to The Chair. The upgrade retains the Cockroach levels already earned; the rules describe reel-five Scatter extensions only for Walk The Line. Direct entry costs 68x the base stake for Walk The Line or 1,500x for The Chair, and three Lucky Draw tickets at 82x, 355x and 784x give a 1%, 20% or 50% chance of The Chair instead of Walk The Line. ToastBet instead raises the ordinary stake by 20% to guarantee a Scatter on reel two.

The measured ordinary mode uses 96.07% theoretical RTP, and its Walk The Line purchase has a separate 96.36% profile. Direct The Chair entry is 96.31%, while ToastBet is 96.03%; neither mode has a separate measured series here. The ordinary bet limits are EUR 0.20–100; reaching 75,000x ends the round. Nolimit City assigns Extreme volatility, rated 10.0, and gives a simulated maximum-win frequency of one in 6.5 million rounds.

Mechanics7 from the rules screens
  • Free spins
  • Scatter symbol
  • Wild symbol
  • Multiplier
  • Expanding symbol
  • Retrigger
  • Bonus buy
Paytable
x total bet · bar = top payout on a log scale
symbol 345
Forehead-Tattoo Prisoner 0.6x 1.2x 2.5x
Eyepatch Prisoner 0.5x 1x 1.4x
Ace 0.2x 0.6x 0.9x
Cap Prisoner 0.4x 0.9x 1.2x
King 0.2x 0.5x 0.8x
Bandana Prisoner 0.3x 0.8x 1.1x
Queen 0.1x 0.4x 0.6x
Wild 0.6x 1.2x 2.5x
Dark-Haired Prisoner 0.3x 0.7x 1x
Jack 0.1x 0.3x 0.5x
Ten 0.1x 0.2x 0.3x

Bet range EUR 0.20 – 100 per spin · payouts read from the game's paytable at bet EUR 1.00

Verdict

The first Chair spin after the upgrade

Seven Walk The Line spins had accumulated EUR 34.70 when a fifth-reel Scatter changed the feature in ordinary round 6333. It added two spins and upgraded the three remaining turns to The Chair. The next turn alone paid EUR 9,660, followed by EUR 13.60 and EUR 10.50, bringing the complete ten-spin bonus to EUR 9,718.80. Its triggering spin had paid nothing.

That one round paid EUR 9,718.80 of the EUR 18,123.40 returned by 10,000 ordinary EUR 1 rounds, which is why the series finished at 181.23%; without it the series would have finished at 84.05%. Of those 10,000 rounds, 7,661 returned zero, and the median payout among rounds that did pay was EUR 0.60. All 63 natural features entered Walk The Line, with round 6333 supplying the only Chair upgrade; the separate fifty-ticket sample stayed entirely in Walk The Line, including its largest EUR 1,060.60 result from ticket 20.

On the first Chair spin, matching dark-haired prisoners and substituting Wilds counted as 2, 12, 20, 3 and 4 instances across the five reels. Multiplying those counts produces 5,760 paying ways, each worth EUR 1 at the tested stake. Kings contributed another EUR 3,840, Queens EUR 20 and Tens EUR 40 to the same EUR 9,660 spin.

Measured upsides
  • A reel-five Scatter can turn an ordinary Walk The Line entry into The Chair, as one natural feature showed
  • Split Scatters at entry lengthened four natural features to nine or ten spins
  • Eight Walk The Line spins in ordinary round 7675 paid EUR 298.60 without a Chair upgrade
Measured downsides
  • The fifty EUR 68 purchases produced zero Chair upgrades
  • The smallest purchased result was EUR 6 after eight spins
  • A 32-round stretch of ordinary play produced no payout

Test record

10,000 rounds · 50 buys · open data · closed rig

One test run so far: a single session of the base game plus a separate series of bonus purchases on the official demo server, every request and response logged. When the game is tested again, the new run is added here and the figures on this page combine all runs into one sample.

result of this run2026-10-03
Measured return 181.23% 95% band -9.8–372.2% · declared 96.07%
  • 10,000rounds logged
  • 23%rounds that paid
  • 9,719xbiggest round
  • 1 / 159natural bonus rate
  • 0.89xmean of 50 buys
  • 32longest dry streak
return of this run with its 95% banddeclared 96.07%
Run 1 · 2026-10-0310,000 rounds
181.23%95% band -9.8–372.2%
-15%5%25%45%65%85%105%125%145%165%185%205%225%245%265%285%305%325%345%365%declared 96.07%
dot = measured return · whisker = the range the long-run value is likely to sit in, given this many rounds
how the return settled, round by round10,000 rounds
181.23% after 10,000 roundsdeclared 96.07%
line = return measured up to that round · the line swings early and calms as rounds pile up
bonus purchases, run by run50 buys
Run 1 · 2026-10-03mean 0.89x · median 0.41x · 42/50 below price
bar = one purchase, what it returned as a multiple of its price · dashed line = the price · square-root scale
The run · tap to open
01run Run 012026-10-03 10,000 rounds at EUR 1.00 · 50 buys · rig 0.8.7 · RTP profile 96.07% measured return181.23%+85.2 pts vs declared 95% band-9.8–372.2% natural bonuses63 · 1 / 159 bonus buys, mean0.89x
95% band
-9.8–372.2%
rounds that paid
23%
biggest round
9,719x · round 6,333
longest dry streak
32
natural bonuses
63 · one per 159 rounds
bonus buys
mean 0.89x · median 0.41x · 84% below price
balance start → end
10,000 → 18,123
deepest drawdown
1,561x
Download this run · the square button copies the file’s SHA-256, so you can confirm the download is unchanged

10000 ordinary paid rounds, including naturally triggered features, at a fixed EUR 1.0 bet; 50 bonus buys at 68.0 each (68.0x); mode: EUR 1 ordinary demo stakes, with ToastBet switched off. Naturally triggered Walk The Line and The Chair features remain within their triggering ordinary rounds. The separate purchase series contains fifty EUR 68 Walk The Line tickets, using the 96.36% theoretical purchase RTP. No direct EUR 1,500 The Chair tickets or Lucky Draw purchases were sampled. Browser photographs and the recorded EUR 68 ticket are independent media sessions, excluded from both statistical samples. on the official Nolimit City demo server (jurisdiction DEFAULT, RTP profile 96.07%); every request and response logged; test run 2026-10-03.

The test rig plays the official demo build over the network and records every server round: bet, win, cascade steps, 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 →

CLOSED RIG OPEN DATA

FAQ

6 questions · answered from the log
Can symbol splits exceed the advertised physical ways count?
Lab answer

Yes. Opening every physical position gives 3,456 ways, but symbol copies and Cockroach position values multiply that: in round 6333 the dark-haired prisoner win alone counted 2 x 12 x 20 x 3 x 4 = 5,760 ways, including substituting Wilds, and paid EUR 5,760 at a EUR 1 stake.

Did the EUR 9,660 spin require maximum-level Cockroaches?
Lab answer

No Nest upgrades occurred during that ten-spin feature, so the Cockroaches retained their starting level of 1. Their visits could still build larger position values: on free spin 8, the upper Wild cell of reel three combined three symbol copies with a x3 position value, counting nine instances. Across that spin the largest Cockroach position value was x4; it was not a x10-level Cockroach bonus.

Why are the nine-spin purchases not counted as retriggers?
Lab answer

Nine spins were awarded at entry to four of the 50 Walk The Line tickets because a starting Scatter was split; the other 46 began with eight. None received additional spins after entry, so the measured extension share is zero. A larger starting award and an extension during the feature are recorded separately.

Why does Folsom Prison show 181% RTP in this demo test when the game lists 96.07%?
Lab answer

Because of a single round. Round 6333 paid EUR 9,718.80 on a EUR 1 stake, more than half of the EUR 18,123.40 returned across 10,000 ordinary rounds; without it the series would have finished at 84.05%. The 95% confidence interval, -9.75% to 372.22%, is a normal-approximation range for the uncertain sample mean, not a forecast, and its negative lower bound does not mean a payout can be negative.

Did buying Walk The Line recover its cost in this run?
Lab answer

No. The 50 Walk The Line tickets cost EUR 3,400 and returned EUR 3,015.20, an 88.68% measured return; 42 of them paid less than the EUR 68 price, with a median return of EUR 27.60 per ticket, or 0.406x. These figures describe the EUR 68 entry, not the EUR 1,500 direct Chair purchase.

Does Folsom Prison trigger free spins often, and can The Chair come without buying it?
Lab answer

Fairly often: Walk The Line triggered 63 times in 10,000 ordinary EUR 1 rounds, about once per 159; the longest wait was 734 rounds, between rounds 2644 and 3379. The Chair came once, and only through an upgrade: none of the 63 features started there, and in round 6333 a reel-five Scatter on Walk The Line spin 7 added two spins and turned the last three into Chair spins.

Field notes

0 notes
Slotester Labmeasured run · every request logged measured
  • spins10,000
  • bet1.00
  • result+8,123x
  • RTP measured181.2%
  • bonuses63
  • max win160.0x

Add a field note

Tell what the slot did in your session. Numbers are welcome; casino links are removed.