StreetPass Mii Plaza

StreetPass Mii Plaza is a game included in every system in the 3DS family. It was made to feature the StreetPass feature of the system, which allowed systems in sleep mode to communicate when physically nearby. 
== StreetPass ==
Data exchanged could be used in a variety of games with whatever kind of functionality the developers intended. While most other games used StreetPass data for non-essential bonus features, Streetpass Mii Plaza requires the player to collect StreetPasses or Play Coins in order to play a variety of sub-games. 
To play, the user first creates a public profile that is shared via StreetPass. This includes a Mii, a greeting, and a few personal facts, such as their dream for the future or hobbies. These details are then used in some of the sub-games, allowing for different things to happen depending on the group of StreetPasses that were gathered.
== Sub-Games ==
* Puzzle Swap
** Players collect puzzle pieces to complete 3D pictures related to various games. New puzzles were added through updates, often being promotional tie-ins to recent or upcoming releases. One puzzle was made for Ultimate NES Remix.
* Find Mii I & II (StreetPass Quest I & II)
** Players gather a group of Miis to take part in an RPG-like adventure. The favorite color of each Mii determines the type of magic they can use, with certain types being necessary to progress through certain rooms.
* Mii Force (StreetPass Squad)
** Players gather a group of Miis to assist them in a scrolling shoot-'em-up game. Each Mii pilots a weapon pod the player can collect, and their favorite color determines the type of attack they have.
* Flower Town (StreetPass Garden)
** Players tend to plants in a garden, with a variety of jobs to complete and many types of flowers to grow. Other players met via StreetPass bring their own flower to your garden, watering your plant and possibly producing seeds by breeding their plant with yours.
* Warrior's Way (StreetPass Battle)
** The player commands an army which they can use to conquer countries in a campaign. Other players met through StreetPass can either appear as allies which donate soldiers from their Plaza, or as enemy generals who can be fought.
* Monster Manor (StreetPass Mansion)
** The player explores a haunted mansion, fighting monsters and collecting map pieces from other players met through StreetPass. The other Miis' favorite color determines the color of the map piece you can receive, with bonuses for building large rooms of a single color.
* Ultimate Angler (StreetPass Fishing)
** Players go fishing on an island, trying to catch all the types of fish available. Players met via StreetPass can give you bait depending on their favorite color, which can then be mixed to attract particular fish.
* Battleground Z (StreetPass Zombies)
** The player plays a top-down beat-'em-up style game in a zombie apocalypse. Miis from StreetPass will share weapons based on their hobby.
* Slot Car Rivals (StreetPass Slot Racer)
** Players build their own slot car and compete in races. The more people met at once, the stronger parts they can give to the player.
* Market Crashers (StreetPass Trader)
** The player tries to make money on the stock market by watching as prices fluctuate while buying and selling appropriately. Miis met by StreetPass become advisors, giving predictions as to how the price will move.
* Feed Mii (StreetPass Chef)
** The player runs a restaurant in the same kingdom seen in Find Mii. Miis from StreetPass are heroes that must be fed by cooking the ingredients they give the player. The better the meal, the more progress they make in their adventure.
* Ninja Launcher (StreetPass Ninja)
** The player is a ninja who must fight various monsters. The Miis met via StreetPass have equipment to help, but the player must use their varying heights to place their items in the path of the ninja as they launch out of a cannon.
* Mii Trek (StreetPass Explorers)
** The player leads an exploration party into a jungle with the Miis they meet with StreetPass. The distance that they can travel each session depends on the total number of steps counted by each of the players' system pedometers.