18NY is an 18xx railroad game set in New York State and surrounding areas. The game is a stock, train, and track building game that uses the 18xx system. Two to six players compete to have the largest net worth in cash and stock at game end. Game play is divided into Stock Rounds and Operating Rounds. During Stock Rounds, players and share companies may buy or sell stock in minor and share companies, open new companies, or take over existing ones. During Operating Rounds, each minor and share company conducts business (laying track, placing stations, and buying trains). At first, stock and operating rounds alternate, but as the game progresses, the number of intervening operating rounds increases.