These additions to the base game provide new maps, rules, and challenges, offering varied gameplay experiences. A specific example might include a version featuring a map of Asia, incorporating new route types such as mountain passes that require additional locomotives to claim.
The significance of these expansions lies in their ability to extend the lifespan and replayability of the original game. They introduce fresh strategic considerations, preventing stagnation and catering to diverse player preferences. Historically, they have proven successful in maintaining player interest within the established game system.