From the description: Seven Demons is a supplement for Evil Hat's Fate system, providing seven NPC demons that can be used as dangerous foes or tempting allies for your adventuring party. Although designed with a fantasy lens, this collection of dark spirits can easily be adapted to other genres and settings. Seven Demons is also designed to work in tandem with: - The Great Demon-Goat, a system neutral, one-shot adventure. - Heartbreaker, a pamphlet-sized fantasy FATE game.