Fiasco is a game about ordinary people with powerful ambition and poor impulse control. There will be big dreams and flawed execution. It won't go well for them, to put it mildly, and in the end it will probably all go south in a glorious heap of jealousy, murder, and recrimination. It's designed to be played in a single session, usually around two and a half hours, with no prep.
Repeated games of Fiasco are always fresh and exciting thanks to the use of "playsets", lists of colorful setting and story ideas that make every game session unique. New playsets are available for free every month in 2010 from Bully Pulpit Games as well as from fans of the game.