AxiomRPG Core Rules is the universal mechanical engine behind every AxiomRPG Genre Catalog. It is a complete, standalone tabletop RPG ruleset; dice mechanics, character creation, combat, advancement, GM tools, and a full threat system. Designed to run anything from high fantasy to urban horror to space opera without retooling the foundation.

Pick up the Core Rules, choose a Genre Catalog, and play. The same skills you learn here move across every setting. The characters grow the same in every world.

The Core Rules are the rules. Genre Catalogs are the settings.

Every AxiomRPG Genre Catalog is built on this foundation without modification. The dice mechanics, Talent list, combat system, and advancement costs are the same in every catalog. What changes: the world, the lineages, the power traditions, the equipment, the factions and the threats specific to that genre.

This means three things:

1. You learn the system once. Switching from a Modern urban horror campaign to a high fantasy campaign means picking up a new catalog, not learning new mechanics.
2. Characters and concepts transfer. A Quickborn Investigator works in Hidden World and on Astraeus Terminal. The Longkin template becomes an ancient elf in Andrus, a long-memory AI in Astraeus, or an elder vampire lineage in Hidden World.
3. GMs run familiar tools. The threat tier system, NPC framework, and encounter design structure work identically across every genre. Your prep skills compound.

The Core Rules make no assumptions about setting, tone or genre. Those assumptions live in the catalog where they belong.

Fairly standard Dice Pool mechanics.

Create Pools by adding Attribute+ Talent.

Dice are rolled for successes (5+) to meet or exceed a Threshold.

Includes Advantage/Disadvantage and Wild Die mechanics

6 Universal Lineages are included in the Core

Genre Catalogs replace Core Lineages

Each lineage presents unique mechanical benefits

A Framework helps create custom Lineages

A clear role filled by a character within society and an adventuring group

Professions are built around an essential Theme

Professions reinforce role identity as characters advance

Common themes can explore unique paths through advancement

Simplified character generation makes the system accessible and easily taught.

Body – Body is the measure of all things physical.

Speed – Speed is the measure of all things involving movement, agility, and reaction time.

Wit – Wit is the measure of all things mental and social.

Standard Lineages and Professions available

Build your own Lineage and Profession

Broad Talent trees allow flexibility through Focus

A power framework provides genre neutral building blocks

A full suite of Player & GM Tools

Character Generator

• All Genre Catalogs Available
• Include your custom data
• Save to JSON or Markdown
• Advance your character with XP

Adventure Planner

• Quick Plots
• 5 Stage Adventure Outliner
• Quick NPC generation
• Encounter Calculator

Custom Data Builders

• Lineage, Profession, Threat and Power Tradition
• Save as JSON or Markdown
• Use your custom creations in the Character Generator