Relax Gaming · 2025 · tested 2026-10-16
Iron Bank 2
Only 759 of the 10,000 base spins in the Iron Bank 2 demo set off Random Mystery, but those spins paid 54.6% of the money, with free spins far behind at 18.4%.
Test card
10,000 spins · FUN 2.00 bet · every request logged| Spins | 10,000 |
| Bet | FUN 2.00 |
| RTP declared | 96.10% |
| RTP measured | 88.26% (approximate 95% CI 68.1–108.4) |
| Hit frequency | 19% · every 5.3 |
| Dead streak max / avg | 41 / 5.33 |
| Median hit | 0.80x |
| Max win (no bonus round) | 576.0x · round 1873 |
| Free spins, natural | 21 · 2.1 bHz · every 476.2 spins · mean FS-only payout 77.5x stake |
| Balance start → end | 5,000 → 2,652 |
each run keeps its own spin log, CSV and raw server journal with checksums; the figures on this card combine all runs
Play Iron Bank 2 demo
RELAX GAMING · official demo · same math as real play
United States
Iron Bank 2 available at Cafe Casino
Same reels, real payouts
Cafe Casino runs the same Iron Bank 2 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
Bonus buy lab
50 buys × 100x · FUN 200 eachmean 1.28x · median 0.246× price (FUN 49.10) · 36 of 50 below price · best 16.28x · worst 0.00x
| Spins per bonus (avg / min–max) | 8.9 / 6–12 |
| Extended | 86% |
| Bonuses that paid nothing | 0% |
Mystery Symbol free spins add two spins each time the sticky Mystery positions reach 6, 10 and 14, so the natural rounds ran 6, 8, 10 or 12 spins; ten of the 21 ended at eight, six at ten and two at twelve.
- Spent
- FUN 10,00050 × FUN 200
- Returned
- FUN 12,780.60127.81% · approximate 95% CI 54–201%
- Net
- +FUN 2,780.60+13.9 buys
- Break-even or better
- 14 / 5028%
- Paid 2× price or more
- 9 / 5018%
- Price in base spins
- 100natural trigger every ~476 spins
One ticket equals 100 ordinary stakes. Natural bonuses occurred once per 476 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 this run needed| 50 bets | bust at spin 115 |
| 100 bets | bust at spin 179 |
| 200 bets | bust at spin 319 |
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
24 rules screens from the game
Iron Bank 2 is a 6x4 slot with 4,096 ways: a symbol pays when three or more copies sit on neighbouring reels counting from reel one; every test spin cost FUN 2.00. Six of the bull or of the Wild pay 50x the bet, six pineapples 10x, the whiskey glass with a cigar 4x, the gold drill 3x and the briefcase 2x, while the royals top out at 0.8x for six aces.
Two base modes are offered, and the series kept the default Random Mystery: before the reels stop, up to 13 Mystery symbols can be dropped on the grid, and every one of them turns into one shared symbol. The other mode, Random Wilds, adds up to four full-reel Wilds on reels two to five with multipliers from 2x to 10x that multiply each other. Either mode can also get a Bonus Symbols Boost of one to three extra Bonus symbols.
Landing three Bonus symbols opens a menu of three free spins modes: Mystery Symbol and Expanding Wilds start with six spins, Multiplier Collect with seven, and the tests always picked Mystery Symbol, where a randomly chosen sticky symbol stays in place for the round. Four Bonus symbols give Super free spins, five give Ultra, and six give Ultra plus 2,000x the bet.
Relax lists 96.10% RTP and a 50,000x cap, and the bet can be set anywhere between FUN 0.10 and FUN 20. Free spins can be bought for 100x, 300x or 900x the bet, each at 96.50%, and the series bought the 100x Standard round; Bonus Reels at 10x the bet and Enhanced Spins at 1.5x stayed off.
Wild symbol
Multiplier
Free spins
Sticky symbol
Bonus buy
Extra bet
Scatter symbol
Bet range FUN 0.10 – 20 per spin · payouts read from the game's paytable at bet FUN 2.00
Gallery
7 frames from the demo session
Verdict
Mystery spins paid the billsRandom Mystery set off on 759 base spins, 7.59% of the series, and those spins paid FUN 9,641.60, 54.6% of everything the 10,000 rounds returned. The count of Mystery symbols decided how much: spins with seven averaged 7.9x the bet, spins with eight 11.94x, and the 15 spins with ten or more 67.47x. In round 1873 eleven of them revealed the whiskey glass with a cigar, the grid paid six of a kind on 144 ways, and FUN 1,152 came back, 576x the bet.
Only 21 free spins rounds started by themselves, once per 476.19 rounds, and they returned 18.4% of the money. Their size followed the sticky Mystery positions: the eight bonuses that finished with ten or more averaged FUN 370.25, the ten that stopped between six and nine FUN 28.34. Round 8562 led them with 580.1x the bet.
Purchases repeated the pattern. Of fifty 100x tickets, the 25 that reached ten or more sticky positions averaged FUN 485.87, ticket 1 paid FUN 3,256 on its own, and in total the fifty paid back 127.81% of the FUN 10,000 spent.
- Ten or more Random Mystery symbols on one spin averaged 67.47x across 15 spins
- Round 1873 turned eleven Mystery symbols into a 576x win on 144 ways
- Bought bonuses reaching ten sticky Mystery positions averaged FUN 485.87
- Free spins started naturally only 21 times in 10,000 rounds
- The ten natural bonuses that stalled at six to nine sticky positions averaged FUN 28.34
- Bought rounds had a median of FUN 49.10 against a FUN 200 price
- One run of 41 rounds in a row paid nothing, from round 6787 to 6827
Test record
10,000 rounds · 50 buys · open data · closed rigOne 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.
- 10,000rounds logged
- 19%rounds that paid
- 580xbiggest round
- 1 / 476natural bonus rate
- 1.28xmean of 50 buys
- 41longest dry streak
01run Run 012026-10-16 measured return88.26%-7.8 pts vs declared
- 95% band
- 68.1–108.4%
- rounds that paid
- 19%
- biggest round
- 580x · round 8,562
- longest dry streak
- 41
- natural bonuses
- 21 · one per 476 rounds
- bonus buys
- mean 1.28x · median 0.246x · 72% below price
- balance start → end
- 5,000 → 2,652
- deepest drawdown
- 1,810x
10,000 ordinary rounds, including naturally triggered features, at a fixed FUN 2 bet; 50 bonus buys at FUN 200 each (100x); recorded on the official Relax Gaming demo server (jurisdiction MT, RTP profile 96.1%); every request and response logged; test run 2026-10-16.
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 →
FAQ
5 questions · answered from the logWhat do Random Mystery symbols do in Iron Bank 2?
Before the reels stop, up to 13 Mystery symbols can drop onto the grid and all reveal the same symbol. In this test the feature set off on 759 base spins, which paid 54.6% of all money returned, with the best, round 1873, worth 576x the bet.
In Mystery Symbol mode, what separated big free spins rounds from small ones?
The more sticky Mystery positions a round collects, the more it pays: natural bonuses that ended with ten or more averaged FUN 370.25, those with six to nine FUN 28.34. Reaching 6, 10 and 14 positions also adds two spins each time, which took two natural rounds to 12 spins.
Would buying Iron Bank 2 free spins for 100x have paid off?
Yes. Fifty tickets returned 127.81% of the FUN 10,000 they cost, though the median ticket paid FUN 49.10 and ticket 1 alone brought FUN 3,256; the remaining 49 came to 0.9719 times their price on average.
88.26% against a listed 96.10%: what explains the gap?
Sample size, above all: an approximate 95% CI of 68.11% to 108.41% surrounds the measured figure and includes 96.10%. The bonus was also scarce, 21 natural rounds in 10,000 that paid 18.4% of the money.
Do free spins in Iron Bank 2 trigger often?
No. About 2.1 per 1,000 rounds (2.1 bHz): 21 natural bonuses in this series, all of them Standard rounds from three Bonus symbols. Super and Ultra free spins, which need four to six, did not appear.
Also tested
4 more slots on the same rig-
Kingmaker
Big Time Gaming · 10,000 spins
2026-10-16
RTP
88.7% 96.7%
hit32%
max120x
buy—
-
Gates of Olympus Super Scatter
Pragmatic Play · 10,000 spins
2026-10-16
RTP
99.7% 96.5%
hit28%
max926x
buy1.51x
-
Danger High Voltage
Big Time Gaming · 20,000 spins
2026-09-28
2026-09-30
RTP
108.8% 96.2%
hit42%
max1,598x
buy—
-
Extra Juicy Megaways
Pragmatic Play · 10,000 spins
2026-09-11
RTP
90.6% 96.4%
hit27%
max65x
buy1.06x
Field notes
0 notes