Iron Bank Demo & review

Iron Bank lets you plan the heist: three Bonus symbols open free spins, and you choose between a sticky Mystery Symbol, expanding wilds on the middle reels, or crates that push wild multipliers up. Relax Gaming built it with the CasinoGrounds community and released it in November 2020, on six reels and 4,096 ways. This is the original, not the later Iron Bank 2. It suits bonus buyers who like deciding how their round plays.

The base game before our first spin, with the Buy Feature button under the reels. FluxPlays demo test, 1 November 2026.

How Iron Bank works

Wins pay across 4,096 ways on six reels of four, and wilds can land on reels 2 to 6. The bull in a suit is the top symbol: six of them pay 50x the bet, and three pay $1.

The base game's big lever is the Full Reel Wild. It covers one of reels 2 to 5 with a multiplier from x2 to x10, and when two or more land, their multipliers multiply each other. By the rules, two x10 Full Reel Wilds put x100 on every way that runs through both.

The rules paytable at a bet of 1, with the Bonus symbol and the bull at the top. FluxPlays demo test, 1 November 2026.

How the parts connect:

1. Full Reel Wilds with multipliers are the base game's top end.
2. Two random events can fire before the reels stop: one to three extra Bonus symbols, or Mystery symbols that all reveal the same symbol.
3. Three or more Bonus symbols open the free spins, and four to six also pay a prize on the spot.
4. You then pick the heist: Mystery Symbol, Expanding Wilds or Multiplier Collect.
5. The buy skips the wait and goes straight to that choice.

The free spins carry the game, and the mode you choose decides what kind of round it becomes.

Free spins: how they trigger and the three heist modes

Three or more Bonus symbols on one spin start the free spins. Four of them also pay 20x the bet before the round begins. Five pay 200x and six pay 2,000x. Then a screen offers three modes, each with its own number of spins and its own volatility bar.

The mode choice after our buy: three heists, three spin counts. FluxPlays demo test, 1 November 2026.

Mystery Symbol

Eight spins. When the round starts, the game picks a random symbol to be its sticky mystery symbol on reels 2 to 6.

Expanding Wilds

Ten spins. A wild that lands on reel 3 or 4 expands to fill the reel and awards a re-spin, and its multiplier rises by one with each win. This is the mode our bought round used.

Our bought round as Expanding Wilds, with one spin left: the expanded wild on reel 3 at x2. FluxPlays demo test, 1 November 2026.

Multiplier Collect

Twelve spins. Coconut crates that land on reels 2 to 5 raise the multiplier on the wilds of the reel they land on, and filling the shooter adds three more spins. For us this is the mode to try first: it has the most spins, and every crate is a step toward a bigger wild.

Can you buy the bonus?

Yes. Buy Feature costs 100x the bet and goes straight to the free spins, and you still choose the mode after paying. It is the only paid option, and it carries a higher RTP than spinning.

RTP, volatility and max win

The demo states 96.20% for the base game and 97.00% for the buy. Relax's own page also lists a 90% German version, so the casino's choice matters here. The game gives no volatility label beyond the bars on the mode cards, and Relax rated it High when it launched.

The demo's rules state no cap. Relax puts the max win at 49,998.9x the bet and ties it to the free spins round you can buy.

Our Iron Bank demo test

Of our base spins, 28 paid, and the best of them, spin 24, was worth $16.00. It never reached the bonus on its own: Bonus symbols landed one at a time on six spins and two at a time on two more, but three never arrived.

The bought round shows the risk in Expanding Wilds, a mode that needs wilds on reels 3 and 4. Ours saw one expansion of note, a x2 on reel 3, in a round that paid $12.20.

Back in the base game after our bought round: WIN 12.20. FluxPlays demo test, 1 November 2026.

One bought round and 100 base spins are far too few to say anything about what Iron Bank returns. Mystery Symbol and Multiplier Collect did not get a run, so both come from the rules.

Is Iron Bank worth playing?

Iron Bank earns its place for one reason: you choose the bonus. The same buy can become eight spins around one sticky symbol or twelve spins of crates and growing wild multipliers, and the buy carries the better RTP. Spinning for the bonus is the weaker way in, since three Bonus symbols have to land at once and no official figure says how often that happens.

Pick Temple Tumble Megaways if you want a Relax game where you also choose your free spins mode, but earn the round by clearing the grid. Iron Bank is the one to take if you would rather trigger on Bonus symbols or buy straight in.

In the demo, buy the round three times and pick a different heist each time. The volatility bars on the cards make more sense once you have seen each mode play.