A 150-page book based on Nat19's Somnus Domina setting, which is the latest in a series of best-selling tomes of subclasses, feats, subraces, spells, monsters, gods, lore, and much more to use in any campaign!

The American Revolution was not won by white men on horses. It was won by the witches, werewolves, and necromancers history has tried to forget. Join the Revolution in this roleplaying game of supernatural horror set in the American Revolution.

Mouseborn is a 5E RPG tucked in a kingdom of winding roots and leaves

Reload. Lock In. Lube up. A queer military sci fi novel that follows three perspectives aboard the privateer vessel The Galley on the frontier of contested space as they attempt to survive pirates, cyborg xenos, and a black hole.

GURPS Ring of Fire, based on Eric Flint's 1632 series, is an all-new roleplaying book compatible with GURPS Fourth Edition.

Outgunned Adventure is back with 3 challenging campaigns.

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

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!)

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.

Escape from the labyrinthine prison-hell of Carcerus!

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.

New classes, curses, and monsters for Vampire Hunting campaigns for the Shadowdark RPG

“All the grisly bits wot weren’t enuff on their own” A true expansion to the Swyvers RPG. More city generator tools, more systems, more grit, more grub, MORE SWYVERS!

Help us create both a Deluxe Edition and a traditionally printed version for sale in stores!

The oldest and most influential sci-fi TTRPG of all time meets the world’s most popular roleplaying game, with a complete 5e conversion by World’s Largest RPGs.

Location/mini-adventure set in a jungle village impoverished by a xorn eating their sole trade good — raw gemstones that emerge from a nearby volcano and flow down a river to them. Encounters scaled to accommodate parties of various levels.

Vault of Monsters is a 5e-compatible adventure rooted in British folklore, full of creatures with personality, lore with attitude, and encounters that escalate without asking permission.

Over 20 years ago, Green Ronin Publishing first brought gamers to the world of Aldea with Blue Rose: The Roleplaying Game of Romantic Fantasy. Now it’s time to step into the world of Blue Rose again, and explore the Commonwealth of Aldis as young heroes.

Last Sabbath, the award-winning masterless rule-light RPG is back with its most complete version, bringing together restored materials that were previously unavailable, and Lust Sabbath, a new standalone companion game for mature players!

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 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.

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?

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

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!