Break the seals of Hell and unleash ultimate evil upon your Pathfinder campaign with an unholy collection of devils, cultists, and worse. Pathfinder Campaign Setting: Hell Unleashed presents twelve diabolically detailed encounters featuring the slaves and masters of the infernal realm, including an Asmodean summoning ritual primed to rip open reality, a lethal Hellknight test of worthiness, glimpses into the soul-markets of the infernal metropolis of Dis, profane details on the infamous Book of the Damned, and a march through the fortress of one of Hell's god-like gatekeepers. Each entry includes full statistics for running a particular encounter or servant of evil, details on its history and machinations, ways to use it an ongoing campaign, maps of the related site, and more.