Version: 2022.3
Language : English
Package states and lifecycle

Package types

Unity’s Package Manager supports two package types:

  • Unity Package Manager (UPM) packages.
  • Asset packagesA collection of files and data from Unity projects, or elements of projects, which are compressed and stored in one file, similar to Zip files, with the .unitypackage extension. Asset packages are a handy way of sharing and re-using Unity projects and collections of assets. More info
    See in Glossary
    , which have a .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
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

Additional resources

Package states and lifecycle
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