---
title: Melty platforms | Melty
description: Where Melty runs (Windows), how it finds owned Steam/store games, Discord community, and Claude Code / Codex publish flow.
canonical: https://melty.casa/platforms
updated: 2026-10-12
---

# Windows app, Steam library, Discord, AI agents

Where Melty runs (Windows), how it finds owned Steam/store games, Discord community, and Claude Code / Codex publish flow.

## 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
- **Page type:** Hub

## What this hub is

Where Melty runs (Windows), how it finds owned Steam/store games, Discord community, and Claude Code / Codex publish flow.

Melty is a free Windows desktop app from Stella Montis Inc., backed by Y Combinator. The public landing still shows Download, How it works, and FAQ only. This hub exists so search engines and AI crawlers can open a clean HTML/Markdown URL for the topic.

Mashups run on games you own. Play downloads the mashup, installs what it needs, and starts the game. Uninstalling puts every file back. Multiplayer mashups get an invite link. You can publish your own mashup by pasting Melty instructions into Claude Code or Codex.

## How to use Melty after you read this

Download the Windows app, press Play on a mashup, and keep or share the lobby link if the mashup is multiplayer. If a required game is missing, Melty opens that game's store instead of pirating a copy.

## Pages in this section

- [Melty for Windows](/platforms/windows) — The only download advertised on the landing: free for Windows.

- [Melty and Steam](/platforms/steam) — Melty starts Steam games you already own (Elden Ring 1245620, Skyrim SE 489830, MW2 10180, Halo MCC 976730, Portal 400, HL2 220, and others).

- [Melty Discord](/platforms/discord) — Community link on the landing: https://discord.com/invite/melty

- [Melty desktop app](/platforms/desktop-app) — A local Windows launcher. It is not a cloud stream and not a browser game.

- [Melty and Y Combinator](/platforms/y-combinator) — The landing intro: backed by Y Combinator.

- [Melty on Claude Code](/platforms/claude-code) — Paste Melty instructions into Claude Code to build and publish a mashup.

- [Melty on OpenAI Codex](/platforms/openai-codex) — Codex is the other named publish agent.

- [Melty on Windows 11](/platforms/windows-11) — Windows 11 is a supported desktop for the free Melty download.

## 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.

## Related

- [Melty for Windows](https://melty.casa/platforms/windows)
- [Melty and Steam](https://melty.casa/platforms/steam)
- [Melty Discord](https://melty.casa/platforms/discord)
- [Melty desktop app](https://melty.casa/platforms/desktop-app)
- [Melty and Y Combinator](https://melty.casa/platforms/y-combinator)
- [Melty on Claude Code](https://melty.casa/platforms/claude-code)
- [Melty on OpenAI Codex](https://melty.casa/platforms/openai-codex)
- [Melty on Windows 11](https://melty.casa/platforms/windows-11)

## Download

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

Markdown mirror: https://melty.casa/platforms.md