In Railways of the World: The Card Game, players use track cards and city cards to build a series of railroad routes and deliver goods. As the game progresses, players work to connect more cities, upgrade their engines and deliver goods through a network of routes. The Railways of the World: The Card Game - Expansion adds new mechanisms and additional bonus scoring options for the base game with: • Tunnels to connect existing cities, giving access to cubes and impacting city control. • Switchers to allow track color to change during building thus allowing connection to a new color city. • Grey Cities to provide additional goods for deliveries. • Barons to provide additional bonus scoring options.