CastleVille is a freemium social network game, combining a number of elements from the developer's other Ville range of games. Set in a medieval world, the game allows players to build their land up with castle elements, and craft armor, art and trade items. The objective is to explore the unknown land around the starting territory and expand the player's empire into it. The character's avatar can be customized, and the world features peasants, pirates, princesses and Vikings. A new reputation system encourages players to be social within the game in order to unlock new items and actions such as trading.