Century 21 partnered with a mobile game developer to promote the real estate brand within the mobile game "We City". Players of the game could add Century 21 branded buildings to their virtual cities for free. Over three weeks, players placed 401,318 branded structures. Century 21 saw this as an opportunity to reach the game's estimated 26 million players. By partnering with mobile games, Century 21 aimed to effectively promote their brand to the next generation of home buyers and sellers.