Unity’s Package Manager supports two package types:
.unitypackage extension. Asset packages are a handy way of sharing and re-using Unity projects and collections of assets. More info.unitypackage format.The following table compares the differentiating characteristics of these package types:
| Characteristic | UPM packagesA Package managed by the Unity Package Manager. Refer to Packages. See in Glossary |
Asset packages |
|---|---|---|
| Format | Collection of files and folders, which might be compressed, depending on the distribution method. | A compressed file with a .unitypackage extension. |
| Primary source for the package | Unity registry, scoped registry, or Asset StoreA growing library of free and commercial assets created by Unity and members of the community. Offers a wide variety of assets, from textures, models and animations to whole project examples, tutorials and Editor extensions. More info See in Glossary |
Asset Store |
| Uses a package manifestEach package has a manifest, which provides information about the package to the Package Manager. The manifest contains information such as the name of the package, its version, a description for users, dependencies on other packages (if any), and other details. More info See in Glossary file |
Yes | No |
| Method for adding the package to a project | Install | Download and import |
| Project folder the package is added to | Packages |
Assets |
| Cache the package is added to | Global cache | Asset package cache. Refer to Location of downloaded asset files. |
| You can manually remove the package from the cache | No | Yes |
| Sets of tabs that appear in the Details panel | Description, Version History, Dependencies, Samples (if provided), Images (if provided) | Overview, Releases, Imported Assets, Images |