This Polygon guide explains how players can get the train working again in the exploration game Big Walk, one of several transport options that must be unlocked through in-game challenges. Rather than being available from the start, the train requires players to complete a specific "tower" puzzle, mirroring the process used to unlock other modes of transport on the island.

To unlock it, players must complete the blue tower on the eastern half of the island, collecting five gourd-shaped items and placing them in the tower's compartments, then using a key at the base to solve a series of keyholes. This leads to a stationary train, which starts moving once the key is placed and can then be boarded. The train travels clockwise around the island without stopping, though nearby stations display schedules, and onboard controls let players sound a horn or adjust its speed.