How to download Unity dots (entity package) with unity 2020.3 LTS?

From Entity Component System – DOTS Project Setup

Starting with Unity 2020.1, the DOTS packages are not listed in the package manager, even when preview packages are enabled. There are two alternative options to install those packages:

  • You can use "Add package from git URL..." under the + menu at the top left of the package manager to add packages either by name (such as com.unity.entities), or by git URL (but this option isn’t available for DOTS packages). Note that it might take a few moments before the package starts installing.
  • Alternatively, you can add DOTS packages by directly editing the Packages\manifest.json file in your project. This file requires not only the package name but also a version which can be found by looking at the documentation of each package (such as "com.unity.entities" : "x.x.x-preview.x").

For example currently it would be com.unity.entities" : "0.17.0-preview.41"

And

Follow the link for more information about installing hidden packages.

Maybe also interesting for you:

The recommended set of core packages to be added to a DOTS project is:

  • com.unity.entities
  • com.unity.rendering.hybrid
  • com.unity.dots.editor

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