In puzzles with 3 or 4 colors, start with the color that has the fewest possible route options. Usually, this is a station buried in a dead-end alcove of the island. Solve that route first, because it will block off tiles for the other colors.
Place dual-tiles on the bottom bridge. Now Red and Blue can cross each other there. Red enters the bridge from the left, Blue from the right, they cross in the middle dual-tile, and exit opposite sides. Railway Islands 2 Puzzle
Many players focus on curves and forget straights. If the puzzle says "Use 8 straights" and you have only laid 4, you must ensure your final route includes long, straight corridors. Conversely, if you have used too many straights early, you will be forced to create impossible zigzags later. In puzzles with 3 or 4 colors, start
: Unlike its predecessor, this sequel often requires coordinating up to three trains simultaneously. Each train must pass specific stations to deliver resources before exiting through a tunnel; failing to complete all deliveries results in a level reset. Dynamic Switch Mechanics Place dual-tiles on the bottom bridge