Universal Modder

Universal Modder is an AI-powered modding framework that gives coding agents the skills to reverse-engineer, build assets, and test mods for PC games.

Universal Modder provides a suite of skills and tools that enable AI coding agents to mod PC games. The framework allows agents to identify game engines, read code, reverse-engineer file formats, and generate art, 3D models, or audio using fal. It supports integration with Claude Code, Codex, Cursor, Gemini CLI, and GitHub Copilot. Each modding cycle involves researching the game, building assets, testing in the live environment, and documenting the process in a shared knowledge base for future agents. The system adheres to strict safety guidelines, avoiding online games with anti-cheat protections and never distributing copyrighted game files. It requires Python 3.10+, ffmpeg, and a valid fal API key for operation.

Universal Modder at a glance

Best for: Software engineer, Designer
Runs on: CLI, VS Code, Cursor, Windows, Linux, macOS
Pricing: Free and open source; MIT licensed.
Released: September 2026
Category: AI coding tool
Website: github.com/rehan-remade/universal-modder

Key features

Reverse-engineering of game file formats
Generation of game assets like sprites, textures, and 3D models
Automated testing and verification in running games
Management of a shared knowledge base for modding routes
Support for multiple AI coding agents and editors
Safety-conscious automation of game inputs and launches
Production of showcase videos from gameplay

Use it for

Adding custom items and bosses to Terraria
Creating new playable civilizations for Age of Empires II
Porting Minecraft features into GTA V story mode
Determining modding routes for unknown PC game engines

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