- Download the Spine Runtime here: http://esotericsoftware.com/spine-unity-download
- Version 3.8-beta is required
- Open the unitypackage with Unity
- Assets -> Import Package -> Custom Package...
- Uncheck Spine Examples to leave them out
- If the asmdef is missing, it will need to be created in the Assets/Spine/Runtime directory and added to each of the project asmdefs