Addventure was an interactive branching story
(much like the Choose Your Own Adventure
and such). You'd choose from one of the branches the story could take, and go on: When you got somewhere that wasn't written yet, you were invited to continue the story and so on.
It's a nice concept, even if it implies on gigantic amounts of disk space
; However, the Addventure site (www.addventure.com) has been left on disuse for a year now, and no replacements
have surfaced. The big guys
don't like the idea of starting a new one here, mainly because tons of writing imply... tons of bad writing