The Pathfinder Roleplaying Game is an evolution of the world's oldest fantasy roleplaying game. (It has been designed with compatibility in mind, so you'll be able to use your existing library of 3.5 products with minimal effort.) Players need only the Core Rulebook to play, while the Game Master will also want the Bestiary. We occasionally release additional volumes expanding the rules in new and interesting directions.
Pathfinder Adventure Path is a monthly, 96-page, full-color softcover book. Each volume contains an Adventure Path scenario, stats for about a half-dozen new monsters, and several support articles. Adventure Paths are released in six-volume arcs, with the scenarios connecting to form a complete campaign.
Pathfinder Modules are bimonthly, 32-page, full-color adventures. They're an ideal product for GMs looking for short or diverse adventures.
Pathfinder Chronicles products add detail to our sword-and-sorcery-inspired Pathfinder Chronicles campaign setting. Pathfinder Chronicles products don't have a regular schedule or a fixed format—they vary from 64-page sourcebooks to a 256-page hardcover campaign setting.
Pathfinder Companion is a bimonthly, player-friendly, 32-page supplement, with each volume detailing a single aspect of the Pathfinder Chronicles campaign setting. Whether it's an in-depth look at a geographic region or a race, Pathfinder Companion volumes will help immerse your players in their world.