Millennium

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Open-source modding framework for creating and managing Steam Client themes and plugins.

Windows Linux

Installation[^1]

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

Packaging Status[^2]

Millennium has been packaged/ported to the following external repositories. SteamClientHomebrew only maintains select derivatives, all other repositories and maintained by the community.

• NixOS: https://github.com/SteamClientHomebrew/Millennium/discussions/832
• Arch Linux (AUR): https://github.com/SteamClientHomebrew/Millennium/discussions/833

Submitting an external package can be done through pull requests.

Building Source[^3]

Refer to BUILDING.md for build instructions for your platform.

Features[^3]

• Custom CSS and Themes: Inbuilt css editor with live-edit capability
• Plugin support allowing full control over Steam
• Exceptionally optimized with a very minimal footprint
• Privacy friendly: blocks Steam analytics & crash reporting out of the box and has no in-built telemetry
• Fully portable
• Maintained very actively, most widespread bugs are fixed in hours.
• Yours. Use it how you want to.

Language Support[^5]

Adding a new locale

Only languages officially supported by the Steam can be added to the Millennium. Check the list here in the "Full Platform Supported Languages" section. Base your locale on the existing english locale, and place it among the existing locales. Name the file lang.json where lang is the "API language code" from the supported language list and append the target file to the localizationFiles here.

Locales are community managed

SteamClientHomebrew only maintains the english locales. If any changes are made to the english locales that wreck another language, contributors are responsible for updating them.

Translation coverage

Translation coverage by language, relative to English.

Sponsors[^6]

Free code signing on Windows provided by SignPath.io, certificate by SignPath Foundation

[^1]: Installing and using Millennium [^2]: External repository packaging status [^3]: Building and developing with Millennium's source code [^4]: View Millennium feature list [^5]: Millennium language support [^6]: Code signing certificate sponsorship