Castle Crush is a strategy game for mobile devices. Players can choose to battle against other players or computer-controlled characters in the game. Another thing: The game’s objective is to destroy the opponent’s castle while defending your own. Players can choose to battle in different countries, each with its own unique set of troops and obstacles. To change lands in Castle Crush, players must first unlock that country by reaching a certain point in the game. Once unlocked, players can select the country from the main menu.