---
title: Melty mashup will not start | Melty
description: Most start failures are a missing owned game, a store not running, or leftover files. Play only starts what it can see. Free Windows app from Stella Montis Inc. Updated 2026-10-12.
canonical: https://melty.casa/guides/troubleshooting-wont-start
updated: 2026-10-12
---

# Fix a mashup that will not start

Most start failures are a missing owned game, a store not running, or leftover files. Play only starts what it can see.

## Facts (2026-10-12)

- **Product:** Melty desktop app
- **Price:** Free
- **Platform:** Windows
- **Publisher:** Stella Montis Inc.
- **Requires owned games:** Yes. Missing titles open their store.
- **Last reviewed:** 2026-10-12
- **Guide:** Melty mashup will not start

## In short

Most start failures are a missing owned game, a store not running, or leftover files. Play only starts what it can see.

## Steps

1. Confirm both games launch outside Melty.

2. Run the correct store (Steam, Minecraft launcher, etc.).

3. Uninstall the mashup to restore files.

4. Press Play again.

5. Report the mashup if it still looks wrong.

## Facts that do not change

Melty is free. Mashups need owned games. Play installs and starts. Uninstall restores. Uploads are scanned. Claude Code and Codex can publish new mashups.

## FAQ

### What is a mashup?

A mod that joins games into one. In SkyCraft, you play Skyrim as a Minecraft player.

### Do I need the games?

Yes. Mashups run on games you own. If you are missing one, Melty sends you to its store.

### What does Play do?

It downloads the mashup, installs what it needs, and starts the game. Uninstalling puts every file back as it was.

### Can I play with friends?

Yes, on multiplayer mashups. Press Play to get an invite link, then keep it private, share it, or go public.

### Can I make my own?

Yes. Copy Melty’s instructions into Claude Code or Codex and say what you want. The agent builds it and publishes it.

## Related

- [How Melty installs, plays, and publishes mashups](https://melty.casa/guides)
- [Answers about price, safety, owned games, and AI](https://melty.casa/faq)
- [Download Melty for Windows](https://melty.casa/guides/download-melty-windows)
- [Install the Melty desktop app](https://melty.casa/guides/install-melty)
- [Play your first Melty mashup](https://melty.casa/guides/first-mashup)
- [What the Melty Play button does](https://melty.casa/guides/press-play)

## Download

Free Windows app: [Download Melty](https://melty.casa/download)

Markdown mirror: https://melty.casa/guides/troubleshooting-wont-start.md