Puzzlehunt

A рuzzlehunt is a puzzle game where teams compete to solve a series of puzzles at a particular site, in multiple sites or via the internet. Groups of puzzles in a puzzle hunt are often connected by a metapuzzle, leading to answers which combine into a final set of solutions.

Some famous annual puzzlehunts are:

College puzzlehunts include the aforementioned MIT Mystery Hunt as well as:

Sometimes, the prize for winning a puzzlehunt is to create the next one.

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Wikipedia