What is Pathfinder?
The Pathfinder Roleplaying Game is an evolution of the Dungeons & Dragons 3.5 edition rules. Players only need the Pathfinder RPG Core Rulebook to play, while the Game Master who controls the action will also want the Pathfinder Bestiary, a massive tome containing more than 350 fantastic foes for your adventurers to face.
The Pathfinder RPG is designed to smooth over a number of the rough spots in the D&D 3.5 rules set. On the other hand, Pathfinder contains numerous additional options and exciting new takes on classic character classes and races, infusing the game with a level of excitement that will carry it years into the future.
Since Paizo released the first playtest documents in March of 2008, more than 50,000 gamers have downloaded the rules and posted their feedback, resulting in a year-long open playtest that was the largest in the history of tabletop roleplaying games. The rules engine that powers the Pathfinder Roleplaying Game has enjoyed more than 10 years of active playtesting and revision, making it the most robust set of fantasy RPG rules ever published.