Introduction
The Pathfinder System Reference Document (PFSRD20) is an essential resource for players and Game Masters (GMs) of the Pathfinder Roleplaying Game (1st Edition), which is based on the d20 System originally developed for Dungeons & Dragons 3.5. The PFSRD20 serves as a free, online compendium of the game’s rules, classes, spells, monsters, and more, providing an accessible way for fans to explore Pathfinder’s mechanics without needing to purchase every rulebook.
In this article, we will explore:
- The origins and purpose of PFSRD20
- Key features and content available in the PFSRD20
- How it compares to official Pathfinder rulebooks
- The legal aspects of using PFSRD20
- Tips for players and GMs on utilizing the resource effectively
1. Origins and Purpose of PFSRD20
Pathfinder 1st Edition was published by Paizo Publishing in 2009 as an evolution of Dungeons & Dragons 3.5 Edition. Since Paizo used the Open Game License (OGL), much of the game’s content could be legally shared and modified by third parties.
The PFSRD20 was created as a fan-made (but officially permitted) online database compiling Pathfinder’s Open Game Content (OGC). Unlike Paizo’s official books, the PFSRD20 does not include:
- Proprietary lore (such as Golarion-specific content)
- Trademarked names (e.g., some iconic characters like Aroden)
- Artwork and flavor text protected by copyright
Instead, it focuses on mechanics, rules, and systems, making it an invaluable tool for players who want to reference Pathfinder’s core gameplay elements for free.
2. Key Features and Content in PFSRD20
The PFSRD20 is organized into several major sections, mirroring the structure of the official rulebooks:
A. Core Rules
- Character Creation: Races, classes, feats, skills, and ability scores.
- Equipment: Weapons, armor, magic items, and gear.
- Combat Rules: Turn order, attacks, damage, and special maneuvers.
- Magic Systems: Spell lists, casting mechanics, and magic item creation.
B. Classes and Archetypes
- All Core, Base, Hybrid, and Alternate Classes (e.g., Wizard, Rogue, Alchemist, Magus).
- Archetypes (class variants that modify abilities, such as the Eldritch Scoundrel Rogue).
C. Spells and Magic
- Complete spell lists for all classes.
- Descriptions of over 2,000 spells from official sources.
D. Bestiary (Monsters & NPCs)
- Stat blocks for hundreds of creatures.
- Templates for modifying monsters (e.g., zombie, vampire variants).
E. Game Master Resources
- Rules for traps, hazards, and environmental effects.
- Guidelines for experience points (XP), treasure, and encounter design.
F. Additional Rules (Optional Systems)
- Psionics (from Dreamscarred Press’s Ultimate Psionics).
- Mythic Rules (high-powered gameplay).
- Downtime Systems (kingdom-building, running a business).
3. PFSRD20 vs. Official Pathfinder Books
While the PFSRD20 is an excellent resource, it differs from official Paizo publications in key ways:
| Feature | PFSRD20 | Official Pathfinder Books |
|---|---|---|
| Content | Only OGC (mechanics, no lore) | Full content (lore, artwork, setting details) |
| Accessibility | Free online | Requires purchase |
| Organization | Web-based, searchable | Structured in books (PDF/print) |
| Legal Status | Uses OGL, no Paizo trademarks | Fully licensed by Paizo |
Pros of PFSRD20:
- Free access to all mechanical rules.
- Hyperlinked for easy navigation.
- Community-updated with new OGC content.
Limitations:
- No setting-specific lore (e.g., Golarion deities, adventure paths).
- Some rules may be incomplete if they rely on proprietary content.
- No official artwork or layout (purely text-based).
4. Legal Aspects of PFSRD20
The PFSRD20 operates under the Open Game License (OGL), which allows:
- Free distribution of game mechanics.
- Modification and reuse of OGC content.
- Commercial use (with restrictions).
What’s Not Allowed:
- Using Paizo’s Product Identity (e.g., named NPCs like Ezren, iconic locations).
- Copying artwork or proprietary text from the books.
- Claiming ownership of Paizo’s rules.
Fan projects (like homebrew campaigns) can legally use PFSRD20 content, but publishing a commercial product requires careful adherence to the OGL.
5. How to Use PFSRD20 Effectively
For Players:
- Character Building: Quickly reference class abilities, feats, and spells.
- Rules Lookup: Check combat maneuvers, skill uses, or magic item effects.
- Homebrew Inspiration: Use OGC to create custom classes or spells.
For Game Masters:
- Encounter Design: Search monsters by Challenge Rating (CR).
- Adventure Prep: Access traps, hazards, and NPC stat blocks.
- House Rules: Modify existing mechanics using OGC guidelines.
Advanced Tips:
- Use PFSRD20’s search function for fast rule checks.
- Cross-reference with Archives of Nethys (another OGC database).
- Bookmark frequently used pages (e.g., grappling rules, spell lists).
Conclusion
The Pathfinder System Reference Document (PFSRD20) is an indispensable tool for Pathfinder 1E players and GMs, offering free, legal access to the game’s core mechanics. While it lacks the lore and artwork of official books, its comprehensive rules database makes it ideal for quick reference, homebrew content creation, and learning the game.
Whether you’re a new player looking to understand Pathfinder’s complex systems or a veteran GM designing custom encounters, the PFSRD20 is a must-use resource that enhances the tabletop RPG experience.
