From Kobold Press:
An alliance of cultists, ghouls, and vampires. A scheme of the dark gods against humanity. New maps, dark realms, monstrous societies!
A few torches, and a mountain of courage. That’s all it takes to go down into the lands of endless darkness.
This project delivers a full 5th Edition campaign of dark fantasy adventure. It begins with undead plagues upon the surface, and then sends the heroes into the Underworld. Into the hungering dark.
Allied with vampires, the darakhul of the Ghoul Imperium turn their attention to the surface. Emperor Nicoforus the Pale remains wary of further expansion, but others are not satisfied with caution. These ghouls have set plans in motion to gain further control of the surface world and spread their dark religion across the land.
This project delivers a full adventure from levels 1 to 13 that begins with stirrings of ghoul trouble in Zobeck and eventually sends heroes into the Underworld to confront the leaders 
The Empire of the Ghouls for 5th Edition Kickstarter offers three main elements:
The Empire of the Ghouls adventure campaign hardcover for the GM, a continuous storyline for an epic adventure from levels 1 to 13, that also includes new undead magic, a detailed tour of the Ghoul Empire, new monsters, and unforgettable villains.
The Underworld Player’s Guide softcover book of new player options, including new underworld races, new subclasses and tools, backgrounds, and undead-themed spells.
A set of additional encounters, the Underworld Lairs. These standalone, single-map adventures are similar to Eldritch Lairs or Creature Codex Lairs. This book will contain between 5 and 12 such encounters, depending on stretch goals.
Together with some book-expanding stretch goals, this project provides new cavernous, dark lairs, character options, and a full campaign to draw adventurers against the dark gods and their minions.
