Unity packages can contain scripts that execute immediately upon import using the [InitializeOnLoadMethod] attribute. If you must use a third-party source, open the .unitypackage with an archive tool (like 7-Zip) first to inspect for unexpected .cs files.
Frequently bought together. Prodigious Creations. Decrepit Dungeon. (29) $10. Velkin Labs. Sci-Fi Level Construction Kit 2. (28) $ Unity Asset Store Decrepit Dungeon LITE - 3D - Unity Asset Store Download File Decrepit Dungeon.unitypackage
The file refers to a popular 3D environment asset developed by Prodigious Creations for the Unity game engine. Package Specifications Unity packages can contain scripts that execute immediately