# Universal Modder

> Open-source toolkit that teaches AI coding agents how to mod PC games you own.

- Official site: https://github.com/rehan-remade/universal-modder
- Loot Llama page: https://lootllama.net/tools/universal-modder/
- Category: Mods (https://lootllama.net/category/mods/)
- Best for: Modders using Claude Code, Cursor or similar agents
- Strength: Agent skills, um CLI and field notes across dozens of games under MIT
- Caveat: Needs an AI agent and setup; not a one-click mod button
- Pricing: Free (Free / open source (agent and fal asset costs separate))
- Platforms: Windows, CLI, Claude Code, Cursor
- Tags: Mods, Open Source, Coding, Agents
- Last verified: 2026-10-14

## Overview

Universal Modder is an open-source toolkit that lets Claude Code mod almost any PC game you own.

It provides skills, tools and the fal MCP for recon, reverse engineering, AI-generated art, 3D and audio, in-game testing and showcase videos. It's a framework for an AI agent, not a one-click modding app.

## Key features

- Skills that let Claude Code mod PC games
- Recon and reverse-engineering tools
- fal MCP for generated art, 3D and audio
- In-game testing
- Showcase video creation

## Use it for

- Have an agent build a mod for a single-player game
- Generate custom assets for a mod
- Experiment with AI-assisted modding

## Pricing

The toolkit is free and open source. You pay separately for Claude Code and any fal generation.

## Getting started

Clone the GitHub repo and follow its setup instructions with Claude Code.

## Alternatives

- [Claude Code](https://lootllama.net/tools/claude-code/): Agentic coding tool that plans and edits across a whole project from your terminal.
- [NVIDIA RTX Remix](https://lootllama.net/tools/nvidia-rtx-remix/): Modding platform to remaster classic PC games with path tracing and AI textures.
- [Mantella](https://lootllama.net/tools/mantella/): Free mod that lets you talk to any NPC in Skyrim and Fallout 4 by voice.

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From Loot Llama (https://lootllama.net/), a curated directory of AI tools for gamers, modders and game developers. Full catalog: https://lootllama.net/llms-full.txt