MangoUnlock is a free, open-source Steam plugin built on Millennium. Unlock games, install DLC, fix multiplayer — all without leaving Steam.
MangoUnlock is a plugin for Millennium, a framework that lets you add powerful features directly inside the Steam client. Once installed, MangoUnlock lives right inside Steam — no extra apps, no browser tabs, no fuss.
Find a game you want? Hit one button. Want the DLC too? It handles that automatically. Need a multiplayer fix? It patches it for you and backs up your files first. Everything happens inside Steam, instantly.
It's open-source, free to use, and keeps itself up to date automatically.
MangoUnlock packs a full suite of tools into a single plugin — no config files, no manual downloads.
Add any game to your Steam library with a single click. MangoUnlock fetches the manifest from community repositories and installs it directly into your Steam depot cache.
Unlocked a game? MangoUnlock automatically detects and injects all available DLC — no hunting for separate files or running extra tools.
Can't find what you're looking for? Submit a game request directly from the plugin. Requests are routed through the MangoUnlock proxy and reviewed by the community.
Get online on games with broken multiplayer. MangoUnlock patches the necessary files via online-fix.me and creates a full backup before touching anything — so it's always reversible.
MangoUnlock checks for new versions every time Steam starts. When an update is available, you'll see a prompt — one click installs it and Steam restarts automatically.
Before any patch is applied, your original files are backed up. Remove MangoUnlock at any time and your files are fully restored. No permanent changes without your say-so.
No technical knowledge needed. If you can open a terminal, you're set.
Copy and paste a single command into PowerShell. It sets everything up for you — Steam, Millennium, and the plugin — all in one go.
Steam relaunches automatically with MangoUnlock ready to go. No extra setup, no clicking through settings — it just works.
Browse to any game in your Steam library or store page. MangoUnlock adds its buttons right there — click once and you're done.
Open PowerShell and paste the command below. The script handles everything automatically.
irm https://plugin.mangounlock.dev | iex
# Run this in PowerShell as Administrator