A train game or railway game is a board game that represents the construction and operation of railways. Train games are highly involved, hobby board games that simulate the economic and logistic details of running a railway. Like wargames, train games represent a relatively small niche in the games market.
Not every game with a train in it is a "train game". For example, the domino game Mexican Train is not a train game because it does not represent railway operations. Likewise, Ticket to Ride could be considered a train themed game, rather than a train game because it does not contain any of the economic or operational features of running a railway.