This jam is now over. It ran from 2022-02-28 20:00:00 to 2022-03-30 20:00:00. View 34 entries

Make a supplement for an already existing OSR game by someone other than yourself. It can be a class, a race, an adventure, a rules sub-system, or anything else you can imagine. 

Submissions(34)

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Homely random tables to inspire your adventure-free Halfling games…
A free treasure generator for fantasy rpg systems
A free ancient weapon generator for fantasy rpg systems
Burning Wheel races adapted for OSR simplicity
CLASSLESS RULES FOR FANTASTIC MEDIEVAL ROLEPLAYING CAMPAIGNS
A method for running labyrinths and mazes without a map for your TTRPGs
class abilities for brighthammer rpg
goblinoid classes for twg systems
A MOSAIC Strict Spellcasting System
A quick expansion with tweaks to skills, combat, and mecha design for Star Adventurer.
A 1st-2nd level adventure to stop the rise of a new Chaos Cult
How to create a dungeon with a realistic and believable ecology.
A supplement for MÖRK BORG created during the OSR Supplement Jam hosted by Taylor Lane in March 2022.
Some hunt the monsters and undead for the knowledge and without the explicit divine powers of the gods.
when you're so broke you don't even own your own body
This is a new class built for OSE imported from the Chronicles of Aeres setting.
A goat class for traditional pen and paper adventure games.
SAZE is a character expansion by Todd Zircher for the 2022 OSR Jam. RPGPundit has granted permission for use with SA.
A very short zine for OSE/OSR
Three Custom Classes for use with White Box: Fantastic Medieval Adventure Game
An OSR adventure for Swords & Six-Siders (TM) in a Sword & Sorcery setting.
Magical fountains attract adventurers into jungle-bound dungeon.
An OSR Adventure written by Aaron Alexander
A 1-page dungeon exploring a strange tower that appears at twilight, designed for use with Old-School Essentials.
Walkers and War-Wagons is an OSR supplement for vehicles and vehicular combat
An elephant-themed miscellany for OSR-style tabletop games.
an Invisible College supplement for the children of the night
Role Playing
An Adventure for 4th Level characters for Low Fantasy Gaming RPG introducing Stephen Smith's World of Wierth setting.
A horrific monster race for White Box: FMAG.