Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Platformer Tileset 7: Fortified Castle Free.
Platformer Tileset 7 Fortified Castle v1.0
For Adventure games, platformers, RPG and more.
Tileset for make videogames, high resolution : 256×256 pixels.
This tileset include:
-63 terrain tiles
-17 items and decoration elements
-4 animated items
Full Editable – Easy to Modify – High Resolution