Core Rules

Errata OSR+ is an ever-evolving system. You’ll find official errata posted here, and you can also view an archive of our errata and system updates on our website. Session Zero Session zero is a sacred process that gets your game off the ground and everyone excited to be at the table. Share you tips and tricks for a successful session zero and help others get started. Game Masters Gamemastery is an art, but you don’t have to go it alone. In this forum you can engage with other game masters about running OSR+, as well as share GMing techniques for any system. Don’t forget to read the OSR+ Game Master’s guide, which is freely available on our website.

Thread	Views	Activity
For Sage Game Mastery Advice Core Rules	6	May 19, 2025
Chronomancer Revisions Errata	3	June 29, 2025
Revisiting Initiative in OSR+ Errata	6	June 16, 2025
Making the Acid Maleficence Scarier Errata errata	2	May 23, 2025
High and Mighty Session Zero mechanics	45	May 22, 2025
Roles Amongst Rolls Session Zero mechanics	2	May 22, 2025
Let Your Players Have the Last Word Game Masters table-etiquette , actual-plays	1	May 22, 2025
All About Realm Actions Game Masters website , character-creator	1	May 22, 2025
Your "Job" as Game Master is Not to Make the Game Fun Game Masters adjudication	5	May 22, 2025
Quiet Players and You: How to Handle the Less-Outgoing Among Us Game Masters table-etiquette	2	May 22, 2025
Designing for Magic in OSR+ Game Masters dying-earth , mechanics , magic	1	May 22, 2025
OSR+ Player Cheat Sheets Game Masters mechanics , cheat-sheets	1	May 22, 2025
"As Long as You Have MP" and the Channeler Kit Errata rulings	4	May 22, 2025
Custom Notes & Magical Strength for Treasures Errata update , website	4	May 22, 2025
OSR+ GM Cheat Sheet Game Masters mechanics , cheat-sheets	1	May 22, 2025
Choose Your Check Wisely Game Masters mechanics , adjudication	1	May 22, 2025
NPC Shorthand for Encounters Game Masters encounter-design	0	May 22, 2025
When in Doubt, Roll a d6 Game Masters mechanics	0	May 22, 2025
To Explode, or Not to Explode, That is the Question Game Masters mechanics	1	May 22, 2025
Revisiting NPCs as Story Tags Errata update	3	May 22, 2025
Luxury-as-Potions Optional Rules Errata new	2	May 22, 2025
Revised Wizard and Chaos Mage Kits Errata update	1	May 22, 2025
New Beta Status Effects Revisions Errata errata	1	May 22, 2025
Partial Recovery of HP & MP Errata errata	1	May 22, 2025
Monologues & Stun Tactic Revised Errata errata	1	May 22, 2025
Prohibition Against Casting Spells While Using Certain Stances Removed Errata update	1	May 22, 2025
Attacking from Stealth and Skulking Stances Errata errata	2	May 22, 2025
Changes to Spellsing Technique Errata errata	2	May 22, 2025
Adjustments to HP Recovery for Wardens, Barbarians, and the Survival Skill Errata errata	2	May 22, 2025
Introducing Heroic Deeds of Valor Errata new , website	4	May 22, 2025