Thank you!
This tileset does not have a free version, but I can give you more information about its contents. The tilesets are in this format:
(At the bottom right are variants of an individual tile.)
For tiles that overlap (such as trees), one line is skipped vertically between each tile.
For example, it looks like this for the cliffs and the spruces:
For tiles without a tileset, they are arranged in a spritesheet with spacing to avoid any overlap.
There are also duplicates in standalone versions of the trees alone and a few other elements to make it easier to drag and drop them into the scene and position them without having to bother with a spritesheet.
Which game engine do you use?