During the base game, golden upgrade tickets may land on the reels. When they do, they will add carriages to the bonus train which sits above the reels, land it on reel three and you’ll add between four and ten. At first, it may seem like nothing happens as a result, but that’s because you’re waiting for the feature to trigger.
Land three silver ticket scatter symbols and you’ll trigger the Progressive Bonus Game. Here, the train carriages will spring into action, with a minimum of ten active. Each of these carriages will either have a cash prize or a golden ticket which will add up to 10 more carriages to the collection.
The more carriages you have, the higher your potential wins. When all extra carriages have been added, the value of the symbols in all the carriages will be added up, and the total will be your win from the bonus game.
While there will never be fewer than 10, there is no upper limit to how many carriages the train will have, which means the jackpot here is theoretically unlimited!