LOST: Beyond the Looking Glass

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Fanon Alert!
This article contains tribute art, spin-off fiction, theories, reference and community material created by fans inspired by the show.
It is by definition non-canon, but generally distinct from intentionally fake hoaxes or humorous fan parody material.

LOST: Beyond the Looking Glass is a fan-made ARG (alternate reality game) launched in May 2007 after the broadcast of the Season 3 finale "Through the Looking Glass". The ARG begins at two websites whose domain names are the license plate numbers of the automobiles of Jack and Kate from the finale.

Details

Hidden links appeared on the main pages, many manifesting as hotlinked dots. These links lead users to a series of animations, images and clues in the form of anagrams and encoded messages.
There was a hiatus in clues on June 17, but new clues were again presented on June 23.