The set includes asphalt, cobble, dirt, rubble, mud, plaster, rock, sand, and vegetation, and it is meant for Blender, and containing a .blend file.
The pack also features the source images, so you can use them with any sculpting application as alpha textures in PNG format.
You will get a text document with the URL of a Google Drive with the files. You can learn more and get the pack here. Please note that you need to type $0 to download them for free or you can buy the artist a cup of coffee.