IRL Puzzles

Description
A form of storytelling and puzzle design that involves the real world, and players having to interact with the game outside of the internet. This can be in many ways, including roleplaying, geocache hunting, meetups, etc.

GPS Coordinates
A common type of IRL Puzzle is to give players certain GPS coordinates in the world, or a code/cipher that decrypts into GPS coordinates. Then, at these coordinates, there is usually an object of some sorts to collect or view as part of the game.

Scavenger Hunt
A puzzle in which players must follow clues told to them, or left in the world by the puppetmaster. They follow the clues from one location to the next, until finally reaching the end. An example can be found in the Gravity Falls ARG.

Geocache Search
Another IRL search, this time involving some sort of cache or buried treasure somewhere in the world. The methods of finding these geocaches can vary, especially depending on whether or not it is a geocache for an ARG or for the dedicated geocache community. However, they can be found via GPS coordinates or a scavenger hunt, or via more subtle methods. Geocaches often have trackers in them, or are near identifying landmarks, and can potentially be found that way. Geocaches are often not meant to be taken from - while some have an object to collect, for many caches, you are meant to find the cache, and leave the objects inside.

Roleplaying Event
In this case, players are told to meet somewhere at a specific time and roleplay as if they are in the world of the game. This can be done with the aid of an actor at the location. An example of this occurs in 'This is my Milwaukee'.

Mail
Some ARG's allow or require you to submit your address and receive items or letters in the mail that are relevant to the game.