The Money Cart bonus is the heart of Money Train. You trigger it by landing three bonus symbols anywhere on the reels, or by using the Bonus Buy (80x). When the feature starts, the triggering symbols reveal starting multipliers and lock in place. You get three spins on a special set of reels that show only blank spaces or special coins. Each time you land at least one new symbol, the spin counter resets to three. When you go three spins in a row with no new symbols, the round ends, and you collect the total multiplier.

Basic money symbols simply display a value such as 1x, 2x, or 10x your bet and stick in place. They are the backbone of the round. You need a decent base of these before special symbols really shine.

The Payer symbol adds its value to every other symbol currently on the reels, which can give a big jump if you already have several coins sitting. The Persistent Payer is more exciting. It repeats that same action on every spin after landing, constantly boosting everything until the bonus ends.

The Collector grabs the value of all other symbols and adds that total to itself in one move. The Persistent Collector repeats that behavior at the end of every spin. It does not collect its own previous total, but it still ramps the overall value very quickly once the screen fills up.

The Widener symbol expands the reel set by opening an extra reel. This increases the number of positions where money or special symbols can land. You can open up to two extra reels in a single bonus.

In many markets, you can skip the base grind and buy direct entry to the Money Cart for a fixed price. When you do that, some versions increase the RTP to around 98%, which is excellent from a pure numbers standpoint. Of course, that does not remove the volatility. You can still buy a bonus and watch it die in a few low coins.