Getting Started With Unity [Unturned Modding Tutorial]
This video shows all the programs you will need to get started, and explains what each program does and how it can assist you in creating mods.
[Programs]
(Required)
~Unity~ https://unity3d.com/get-unity/downloa...
~Blender~ https://www.blender.org/download/
(Optional)
~ZModeler~ https://www.zmodeler3.com/
~OpenIV~ https://openiv.com/