Millennium for Steam®

Millennium is an open-source low-code modding framework to create, manage and use themes/plugins for the desktop Steam Client without any low-level internal interaction or overhead.

If you enjoy this tool, please consider starring the project ⭐

millennium.mp4

Installation

Automatic Installation (Recommended)

Installing Millennium is only a few steps. See this page for a more detailed guide.

Manual Installation

For normal users, installing via the installers makes the most sense. However when wanting to either develop Millennium, or when the installers do not work, this option can be used. Check our documentation for a guide on how to do this.

 

Core Features

• Plugin Loader

  • TypeScript (React) frontend container in Steam
  • Python backend container in usermode
  • Foreign function interface binding from Python to JavaScript and vice versa
  • Hook modules in the Steam web browser
    • Overwrite/Modify HTTP requests
    • Load custom JavaScript (Native) into web browser
    • Load custom StyleSheets into web browser

• Core Modules

  • Manage and load custom user themes into Steam
  • Manage custom plugins for steam
  • Maintain theme & plugin versions.
  • Manage embedded Python installation
    • Manage Millennium Python Developer Tools
    • Custom package manager for all plugins

 

Platform Support

Supported Platforms:

• Windows (x86/x64/ARM) NT (10 and newer)
• Linux (x84/x86_64/i686/i386)
• OSX (Support planned, WIP)