GATEWAY RPG: The Free Rules Lite d20 Game System
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Tabletop Roleplaying Games
GATEWAY RPG: The Free Rules Lite d20 Game System
Beginner-friendly
High-Fantasy
Get your table playing in minutes, not hours.
GATEWAY RPG is a free, modular d20 system designed for zero-prep adventures, sudden one-shots, and seamless intro sessions. Powered by familiar 5E mechanics but stripped of all the bloat, GATEWAY lets you run any genre instantly: from neon-soaked cyberpunk streets to grit-filled noir alleys.
What’s Inside?
The 42-Page Core Rulebook: A streamlined engine for Players and GMs, available in both English and Spanish (Reglas en Español).
The Deluxe Edition: The definitive 102-page PDF compiling the Core Rules, Solo Rules, and Bestiary into one volume.
Accessible Formats: All rules are formatted in high-quality, printable PDFs with options for both white and book-textured backgrounds.
Ready-to-Play Content: Jump straight into the action with Pre-generated Characters and One-Shot Adventure Modules spanning multiple genres.
The Player’s Toolkit: Includes printable and form-fillable Character Sheets, a 1-page Quick Reference sheet, and a dedicated d20 Oracle for Solo Play.
Starter Bestiary: A multi-genre supplement featuring 25 adversaries across 11 settings, from High Fantasy and Space Opera to Cthulhu-style Horror.
Universal Compatibility: Use the Advanced Play Variant for long campaigns or easily port your characters into D&D, Pathfinder, or Star Wars d20.
Homebrew & Variant Rules Supplement: Level up your game with 20+ pages of optional mechanics. Features include "Spark of Heroism" (Inspiration), Pushing for Success (Partial Success), and Genre Modifiers for high-tension Survival or Cosmic Horror play.
Pocket-Sized Character Sheets: Compact sheets designed for portability and efficiency.
Solo Play Quickstart Zine: A portable, zine-style guide for quick, on-the-go solo adventures.