# Mashup Mods

Build cross-game mashups and total conversions, the "Minecraft inside Elden Ring" or...

- Repository: https://github.com/rehan-remade/universal-modder (9317 stars)
- Category: AI and agents
- License: MIT
- Last updated: 2026-11-01
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add rehan-remade/universal-modder --skill mashup-mods -g -a claude-code -y`
Codex: `npx skills add rehan-remade/universal-modder --skill mashup-mods -g -a codex -y`
Cursor: `npx skills add rehan-remade/universal-modder --skill mashup-mods -g -a cursor -y`
Gemini CLI: `npx skills add rehan-remade/universal-modder --skill mashup-mods -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add rehan-remade/universal-modder`

## Description

Build cross-game mashups and total conversions, the "Minecraft inside Elden Ring" or "skateboarding in MW2" kind. Covers passthrough mods (two games running at once and exchanging state, rendering and collision), porting one game's content or mechanics into another, embedding a decompiled game as a library, and clean reimplementations that read the user's own game files. Use when the user wants to combine two games, bring an enemy, mechanic or world from one game into another, or rebuild a game's runtime, or reimplement the guest's rules headless inside a real host.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Mashups: putting one game inside another

In September 2026 a wave of AI-built mashups went viral: skateboarding in MW2, Minecraft inside Skyrim,
Elden Ring and Mario 64, Black Ops 2 inside Minecraft. They use a handful of patterns. Pick the lightest one
that delivers the idea, and plan the oracles before writing code: these projects fail by drifting, not by
lacking code.

## Before picking a pattern
Work through these steps before writing any mashup code. The routes, patterns and projects they point to
come from existing mashups. Start from the closest one, or design something else and write down why. The
Guardrails at the end always apply.

The rest: https://github.com/rehan-remade/universal-modder/blob/HEAD/.agents/skills/mashup-mods/SKILL.md