In Small Railroad Empires, players step into the role of entrepreneurs competing to build the most prestigious rail company of the 19th century. Each turn, you construct two tracks to expand your network, paying terrain costs and sometimes compensating opponents when you cross their routes. From there, you may deliver goods from factories to cities that demand them, calculating route length for income and prestige, and marking your delivery with a train meeple. Deliveries also trigger Train Cards, which reward you for meeting route conditions and add to your collection for achievements. Alongside expansion and deliveries, players pursue Achievements for extra prestige and may buy new Train Cards from the market to enhance scoring potential.
Timing becomes critical: claiming routes first yields bonuses, and placement around cities and factories can block or force detours for rivals. Secret Contracts and optional variants like Passengers, Industrial Boom, and Rural Connections add further layers of strategy. The game ends once all tracks are placed, the train deck runs out, or cities fill with trains. The company with the most prestige claims victory, proving itself the empire builder of the rails.