Add Non-Steam Activity

[emanoeltosta2]

Non-Steam Activity

A Windows Millennium plugin that publishes games added by Lua as non-Steam Steam activity. It preserves the original launch flow, supports launches from the library and Steam-created desktop shortcuts, reuses one hidden helper shortcut, and uses locally cached artwork.

Task Checklist

Developer

• I am the original author or an authorized maintainer of this plugin.
• I have complied with applicable license requirements and provided third-party notices.
• The plugin is fully open source and does not depend on external paid services.

Plugin Functionality

• I tested the plugin on Steam Client Stable and Beta.
• The plugin provides a focused non-Steam activity bridge for Lua-added games.

Backend Configuration

• Standard Millennium Python backend: No
• Custom binary or non-Python FOSS component: Yes — LuaStatusMonitor.exe is included, and its complete C# source is in this repository. It requires the user-installed .NET 8 Runtime.

Testing Instructions

1. Install Millennium, the plugin, Lua, and the .NET 8 Runtime on Windows.
2. Launch a Lua-added game from Steam, either through the library or a Steam-created desktop shortcut.
3. Confirm the profile shows the game as standard non-Steam activity, and that it clears shortly after the game exits.
4. Verify an official Steam game is unaffected.

The plugin is local-only: it does not bundle Lua or game files, use telemetry, or send personal data to third-party services.

[ejalxndr]

We do not accept plugins that violate Steam's TOS.