GATEWAY RPG: The Free Rules Lite d20 Game System

GATEWAY RPG is a free, rules-lite d20 framework engineered for speed, simplicity, and total creative freedom. Built upon the familiar chassis of 5th Edition mechanics, it serves as the ultimate bridge to the world of tabletop gaming. Whether you are introducing friends to their first session or running a high-octane one-shot for seasoned veterans, GATEWAY gets you playing in minutes, not hours. From neon-soaked Cyberpunk streets to grit-filled Noir alleys, if you can imagine it, GATEWAY can run it.

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.