Game Masters' Guide — Advanced Old School Revival

Start Your Adventure

This Game Master’s Guide is meant to be a soup-to-nuts manual for designing and running adventures in OSR+. The guide demystifies the art of gamemastery, offering guidance for interpreting the core rules and advice for adjudication. Learn how to sculpt the premise of your campaign, engage your players in a collaboratively designed imaginative world, and create an immersive experience your table will never forget!

Core Rules History of OSR+ GM Cheat Sheet