Greenluma_2022_1.3.8-steam006.zip -

Users can manually input specific Application IDs (AppIDs) into a configuration file ( GreenLuma.ini ), forcing the Steam client to list those items as "Installed" or "Owned."

The most common use case. It allows the Steam client to "believe" you own specific DLC for a game you already have in your library. GreenLuma_2022_1.3.8-Steam006.zip

Using tools like GreenLuma comes with significant caveats that any user should consider: Users can manually input specific Application IDs (AppIDs)