Roleplaying Games OSRIC Rulebook Converting Systems

The Maximum Mayhem modules are based on the OSRIC™ System (Old-school System Reference and Index Compilation) which is very similar to the first edition of Advanced Dungeons and Dragons or 1e. They can be easily adapted to any First Edition Style Fantasy RPG or OGL / OSR Style System, AD&D, D&D 2e to 5e, Pathfinder, DCC, D20 System, or any system you want to use.

Download OSRIC free: OSRIC as PDF

Order POD physical copy: OSRIC Print on Demand

More about OSRIC:

Intro to playing Original D&D: Quick Primer for Old School Gaming

Related Rulebooks and Expansions for OSRIC and Beyond

Usherwood Adventures Expansion for OSRIC: Order POD Copy

OSRIC Unearthed: Order from RPG Now

First Edition Fantasy: Dungeon Hazards: Order POD from Lulu