Dungeons and Dragons has a long and storied history, but like all long and storied histories there are some bumpy parts. When Third Edition (3e, and then 3.5e) came out, the first version of the game produced by Wizards of the Coast, many of the old guard were less than pleased. It was this reaction that planted the seeds for the OSR movement, in addition to the Open Gaming License (OGL), which made it easier to use the basic mechanics of existing D&D rulesets. Despite having detractors, 3e was wildly successful, so successful that it too inspired a wave of dissatisfaction when it was replaced by the significantly revised Fourth Edition (4e). The shift in design and the decision to discontinue the OGL at the end of the 3.5e product run not only alienated some players, but left many content producers hung out to dry. One of these was Paizo Publishing, a well-regarded outfit who had made a name for themselves publishing Dungeon and Dragon magazines. When this license expired in 2007, the entire company was in jeopardy. It was then that Paizo made a bold move and developed its own OGL-based game, Pathfinder.