metapuzzle - A puzzle whose solution mechanism requires the solving of several other puzzles first.
TimeHunt
www.timehunt.com is a great example of a site that has many individual puzzles to conquer, with a single puzzle on each of the nine Milky Way planets that require not only putting several puzzle results together, but trying to figure out which results go with which metapuzzle and how.
AKA: meta (not to be confused with 'meta' posting).

Posted: Sun Jun 13, 2004 10:56 am