Starting with a mammoth 18-month open playtest of the Pathfinder RPG core rules that went through 3 iterations of the Alpha Playtest and a Beta Playtest before the final version was published, most of the 'core' books in this game line have also been developed in collaboration with enthusiastic players, who are invited to download free playtest versions, try them out and then comment on them via the extensive Paizo messageboards. It's a fascinating archive of a game system's development, and I'm sure that I'm not the only person to archive them even once the final books are released!
Page last updated: 16 April 2011