Horizon RPG System

Horizon is a rules-lite tabletop roleplaying game system featuring a unique runic inscription magic system. Set in a world where magic flows through ancient symbols and glyphs, characters inscribe runes onto their bodies, weapons, and surroundings to channel supernatural power.

Design Philosophy

• Simple Math: Addition and subtraction only. Typical modifiers range from -1 to +5.
• Bounded Accuracy: Success remains meaningful at all levels. A goblin can still threaten a veteran.
• Runic Identity: Magic is visual and tactile, expressed through inscribed symbols rather than abstract spell slots.
• Narrative Focus: Mechanics enhance storytelling rather than slow it down.
• 10-Level Cap: Progression is meaningful and campaigns reach satisfying conclusions.

The World of Inscriptions

In Horizon, magic manifests through seven runic domains:

Characters learn to inscribe these domains as glyphs on their skin, etch them onto weapons, or trace them in the air. The more powerful the inscription, the greater the strain on the inscriptor.

What You Need

• One 20-sided die (d20) per player
• A set of polyhedral dice (d4, d6, d8, d10, d12)
• Character sheets
• This rulebook

Core Mechanic

When the outcome is uncertain, roll a d20, add your modifier, and compare to a target number:

d20 + modifier >= target number = success

That’s it. Everything else builds on this foundation.

Quick Start

1. Create a Character (Chapter 2): Pick a Path, background, assign stats, and choose talents.
2. Learn the Runes (Chapter 5): Understand domains, inscriptions, and strain.
3. Master Combat (Chapter 6): Understand actions, attacks, and wounds.
4. Play: Roll dice, tell stories, and have fun.

Horizon is designed for use with the Tavern application but can be played entirely on paper.