An engine is required for each train. Engine can only be swapped before the game starts. The game is over when the engine crashes. For balancing reasons, engines have different max wagon capacity, water capacity, and initial speed at the start of a biome.

Name Start Speed Max wagons Water capacity Note Handbook description
Hydro Coaler 1st station 5 60.0s This is the default starter engine The Hydro Coaler Engine is a time-honored choice for railway construction. It features an essential water tank that requires regular filling to prevent overheating.
Toy Engine 1st station 4 60.0s Infinite life A toy engine for those seeking stress relief. In the event of a crash, the engine always restarts from the last station. No highscores are recorded but savestates can be loaded multiple times.
Pusher Engine 4th station 6 40.0s It is fine to crash the first wagon (unless that wagon is essential) An engine that can be placed anywhere in the train configuration!