Fro those who have never played an ARG and are interested in understanding them more, here are some sample ARGs.
* Dave Szulborski‘s ‘Errant Memories’. A game Szulborski created for beginners. He takes you through the whole process, explains what do in his two books: This is Not a Game, 2005, pp. 343-377 and Through the Rabbit Hole, 2005, pp. 105-132. Szulborksi is a highly regarded ARG designer and the books are an excellent introduction (the only ones around!) to the genre.