In StreetPass Battle, you play as the ruler of a remote country in a war-torn land. With help from your butler, Wentworth, you build an army from StreetPass tags with other Nintendo 3DS players. Each StreetPass tag earns you an army the size of their Mii Plaza population. With your army you battle other generals. The ultimate goal is to conquer the world! Tickets are earned which can be redeemed for accessories for your Mii.