The Black Spire Pact is a slipcased pair of PvP adventure books where one player is a mortal sorcerer, the other a demon lord. PvP Gamebooks use a streamlined system built on and fully compatible with Old-School Essentials.

A doomed starship warps through the abyss and crashes into a sword-and-sorcery world, unleashing cyborg demons and alien tech. Classic science-fantasy meets 90s-inspired radness as high-level heroes face the forces of chaos in the hell-corrupted wreck.

Will you poor souls become heroes, or will all Hell break loose in the final installment of Afterthought Committee's Level-0 series for Old-School Essentials?

A zinepack of adventure modules for Old-School Essentials.

Delve the depths of evil with new demons and devils for your Old-School Essentials game, each with full stats and a small adventure showcasing these infernal entities. Perfect for Referees who need a few fiends in low places!

This Demonic Adventure for the Old School Essentials system takes a party into a small pocket dimension of the hells. (A little Hellraiser and a bit of Silent Hill thrown into the Slaughterhouse sausage!)

Escape from the labyrinthine prison-hell of Carcerus!

A dark and whimsical OSR forest crawl adventure zine.

A new OSE bestiary of ancient horrors! Explore the Qliphoth, demons born from discarded divinity. Includes new spells, lore, and the occult scholars who dare name them. Knowledge is power, but every truth corrupts.

A series of connected adventures starting in our mortal realm and descending into Hell itself.

A city-crawl through a profane realm of the subtle divines of Vedic myth, created in homage to City-State of the Invincible Overlord and serving as a meta-commentary on syncretism, hedonism, and orientalist tropes on India across the history of gaming.

A low-level adventure set in the plagued wilderness and abandoned mines of a crumbling dwarven mining town. Demon-hunters march in force, strange beasts stalk the woods, and cultists dig for something still buried in the silver mine...

An Interdimensional Hell-Market for Old-School Essentials. Life is cheap here...but a good soul will cost you.

HELLCRAWL is a jumbo sized hexcrawl set in Nethria, the Burning Hell. This infernal module is built for Old-School Essentials and will throw your unfortunate players down into the darkest depths of hell.

An official OSE supplement of demons, cults, and dark magic.

A zine about the multiple ways the humble hex can be used at your tabletop RPG including a hexcrawl that allows you to string all those ways together

Triple-O is a tool for solo RPG players who want to invert roles and play as the GM instead of a character. Originally launched as a one-page solution, this new zine version brings more random tables, examples, and new use cases!

RESERVOIR is a body horror puzzle dungeon featuring an immense alien creature found in the sewers deep beneath The Great City. Many meat-based challenges await those who dare to prevent the scourge of The Flesh!

A mind-bending escape room adventure exploring a wizard's manse. Master the rules of the dungeon and use them to your advantage.

An old-school style dungeon Zine for OSE (B/X, AD&D), D&D 5e and DCC TTRPGs, inspired by ancient Rome, The Mouth of Mentius is like Caverns of Thracia crossed with Barsoom: a 73-room tabletop roleplaying mini-campaign of classic myth and weird fantasy