Boku to Sim no Machi - Party (Japan), 僕としムの街パーリー, is a Nintendo DS game developed by Marvelous Interactive and released in Japan on April 17, 2008. It is a city building simulation game with a unique twist. The player takes on the role of a mayor and must build a city from the ground up. The game also features a party system, where the player can invite up to four friends over to their city to explore, play mini-games and participate in various activities. The game starts off with the player selecting a character and building their own city. The player is then responsible for managing the city, assigning tasks to citizens, collecting taxes, and expanding the city. Players can also construct buildings, create roads and parks, and build a variety of attractions and facilities. As the city grows, the player can unlock new buildings, items, and features. The party system in the game allows players to invite up to four friends over and participate in various activities. These activities range from mini-games, such as bowling, to playing music together. Players can also battle each other in a variety of mini-games, such as races and sports. In addition, players can also trade items, exchange gifts, and even build a house together. Boku to Sim no Machi - Party is an enjoyable city building simulation game with an interesting twist. The party system adds a unique element and allows players to enjoy the game with their friends. With its charming visuals and simple gameplay, it is sure to be a hit with Nintendo DS owners.