Mii Trek (StreetPass Explorers in PAL regions) is a safari game developed by Prope as a part of the StreetPass Mii Plaza. It released in the 5.0 update alongside 4 other games. The player explores the wild frontiers alongside Streetpassed explorers.
The player travels through the jungle with other explorers. Before the trek, the player will be shown a map which shows points of interest. As the player goes, explorers will get lost and the journey stops when there are no explorers.
During the trek, the player makes choices at forks and several paths can be dead ends. Players also encounter events like chests and boulders on the path. For animal encounters, the player has to aim for the dot on the animal.