The feature is guaranteed to trigger if 4 Golden Coin symbols and a Cash Train symbol land on the reels in the same spin.

Hold & Win starts with 3 Free Spins, and each time a Golden Coin, Jackpot Coin, or Cash Train symbol lands on the reels, the spins are reset to the maximum amount. The only symbols present on the reels during the bonus are Golden Coin, Jackpot Coin, Cash Train, and empty symbols.

During Hold & Win, all Cash Train symbols that land on the reels are locked and remain until the end of the feature. All Cash Prizes that land on the reels are collected once by each Cash Train symbol, and are awarded when the feature ends.

The Conductor feature can trigger on each spin during the normal game and is always active during the Hold & Win bonus when unlocked. When it triggers, the reels expand to 5x5 for a single spin. When the feature triggers during the Normal Game, additional Win Lines are present while the reels are expanded, and a Win Line is guaranteed to form.

The Storm feature can trigger on each spin when unlocked. When it triggers, a 2x or 3x multiplier is applied to up to 6 positions on the reels during the Normal Game, and up to 5 during the Hold & Win bonus. Multipliers cannot be added to the middle reel. When the prize of a symbol on a position with a multiplier is collected, the multiplier is applied to the prize. If a Win Line is formed by multiple symbols on positions with a multiplier, the multipliers are summed together and applied to the award of the Win Line.

The Tunnel feature can trigger on each spin during the normal game when unlocked. During the Tunnel feature, only Golden Coin and empty symbols can land on the reels. Golden Coin symbols lock on the reels, and their Cash Prizes are collected at the end of the feature. The Tunnel feature continues until a spin where a Golden Coin symbol does not land on the reels, or the reels are filled with Golden Coin symbols, and no new symbol can land on the reels.

The Steam feature can trigger on each spin when unlocked. When it triggers during the Normal Game, each reel, except the middle one, can be filled with either Golden Coin or Wild symbols. Only 1 type of symbol can appear from the feature when triggered during the Normal Game. When Wild symbols appear, they always form a Win Line.

When it triggers during the Hold & Win bonus, each reel, except the middle one, can be filled with Golden Coin and Jackpot Coin symbols.

There is a Train Progress with 4 levels above the reels. The levels need 10, 25, 50, and 100 spins, respectively, during the Normal Game to fill. The next level is unlocked on the next spin, after the counter reaches 0. The effects of each level are:

• Level 1 - The Steam feature can trigger.

• Level 2 - The Tunnel feature can trigger.

• Level 3 - The Storm feature can trigger.

• Level 4 - The Conductor feature can trigger.

The Train Progress is saved throughout play sessions for the game. Only 1 of the unlocked features can trigger at a time.

There are 5 jackpots above the reels. When a Jackpot Coin symbol lands on the reels while a Cash Train symbol is present, the corresponding jackpot prize is collected by each Cash Train symbol. Jackpot Coin symbols land on the reels only during the Hold & Win bonus. Up to 5 Jackpot Coin symbols can land on the reels per spin.

The awards are:
Mini jackpot - 15x the Stake
Minor jackpot - 25x the Stake
Major jackpot - 50x the Stake
Maxi jackpot - 100x the Stake
Grand jackpot - 500x the Stake

One Cash Train symbol can only land on the middle reel per spin. Cash Train symbols collect the cash prizes and jackpot prizes of any Golden Coin and Jackpot Coin symbols that are on the reels in the same spin.

Up to 12 Golden Coin symbols, which contain cash prizes with values of 1x, 2x, 3x, 5x, 7x, or 10x the stake, can land on the reels per spin. Cash prizes are only won if a Cash Train Symbol is present on the reels to collect them. If the cash prize values are too big to display, they are instead displayed as bet multipliers.

Golden Coin symbols cannot land on the middle reel, except during the Tunnel feature.

When a Golden Coin symbol lands on the reels, it adds a coin to the pile above the slot and has a chance to trigger the Hold & Win bonus. The graphical accumulation of these coins is purely for visual entertainment and does not have any influence on the chance for triggering of the feature. When a Golden Coin symbol triggers the Hold & Win bonus, symbols are added to the reels until there are up to 5 Golden Coin symbols and 1 Cash Train symbol.

The Wild symbol substitutes all other symbols except Golden Coin, Jackpot Coin, and Cash Train symbols. Wild symbols only land on the reels when the Steam feature triggers.

All symbols pay from left to right on the defined paylines.