The Core Rules (2014) are built on the System Reference Document (SRD) 5.1, an open set of tabletop RPG mechanics released by Wizards of the Coast. These rules form the foundation of the original 5th Edition ruleset, adapted and enhanced within Squire 5 for streamlined digital play.
Squire 5 uses the SRD 5.1 to deliver familiar, flexible, and customizable tools for players and GMs alike.
What Are the Core Rules?
The Core Rules refer to the content of SRD 5.1, published in 2016, based on the 5th edition of Dungeons & Dragons from 2014, and later re-released under a Creative Commons license. These rules provide a fully open, legally usable framework for creating and playing 5e-style games.
Originally developed by Wizards of the Coast, the SRD 5.1 laid the groundwork for a wide variety of fantasy RPGs, from official Dungeons & Dragons to third-party titles like Tal'Dorei, Grim Hollow, and Tome of Heroes. Its enduring appeal lies in its balance of simplicity and flexibility.
What's Included in the Core Rules?
The Core Rules covers the core pillars of fantasy RPG gameplay. Squire 5 makes this material accessible through interactive tools and references, including:
- Gameplay Rules: Dice rolls, abilities, combat, and exploration mechanics
- Character Creation: Classic species and classes like elves, dwarves, fighters, and wizards
- Magic: Spells from healing to fireball and beyond
- Monsters: Game-ready stat blocks for allies and enemies
- Equipment: Gear, weapons, armor, and adventuring supplies
It's not everything from the official books—but it's enough to start building your world and running adventures.
Why the Core Rules Still Matter
The Core Rules remains widely used because it's:
- Open and Free: No purchase needed, no licensing hoops
- Proven: A foundation used by thousands of creators and games
- Extensible: Easy to build on, modify, or use as-is
Whether you're designing your first character or building a full campaign setting, the 5.1 rules are a reliable base.
How Squire 5 Uses the Core Rules
Squire 5 incorporates the Core Rules to power much of its rules engine and features. Here's how we've made it better:
- Streamlined Interfaces: No PDFs or rulebooks—just intuitive digital tools
- Enhanced Options: We go beyond Core Rules limitations with expanded features
- AI-Driven Help: Get in-context explanations, worldbuilding suggestions, and rules support
This makes Squire 5 a powerful way to use classic 5e mechanics in a modern, customizable environment.
Explore the Core Rules
Want to run a classic 5e-style game or build something brand new? The Core Rules give you the tools to start. With Squire 5, they're easier to learn, easier to use, and more flexible than ever.
Dive in, explore the tools, and start building your next adventure.