You need the Carcassonne base game to play this expansion. The Count of Carcassonne oversees the city of Carcassonne. When the Count isn't monitoring a district you have invested in, you can take over features someone else controls. The Cultists challenge monks in neighboring abbeys. Complete your shrine before a nearby abbey to deny points to other players. The King and the Robber give you points when you complete the largest city and the longest road. The River II is a new and exciting way to start the game. With its own unique shape, it can also be combined with the River from the base game.