An Adventure Path is a series of interlinked adventures (campaign) for tabletop role-playing games which can be played in succession and lead characters to advance from lower to higher levels, through a particular path of events.
Though the term was originally applied to the series of Dungeons & Dragons 3rd Edition modules beginning with The Sunless Citadel, it later came to refer to several lengthy series, each consisting of 11 or 12 installments, published sequentially in Dungeon magazine.
With the transference of Dragon and Dungeon back to Wizards of the Coast, Paizo Publishing, which had been producing the magazines under contract to WotC, continued the Adventure Path concept in their new monthly publication, Pathfinder.
Paizo began publishing Pathfinder Adventure Path as a monthly publication in 2007.
Starting with Council of Thieves in 2009, Paizo's modules began supporting their Pathfinder Roleplaying Game in addition to D&D.