Check out a huge pack that will help you build your own top-down games.
Alex Akins has recently released HexTile: Nature Pack. The release features an environmental asset pack useful for the creation of stylized, detailed hexagonal-themed natural environments that could be used for top-down RPGs, strategy games and more. The set includes numerous high quality, hand-sculpted assets, fully-PBR textures, custom shaders with advanced effects including moss growth, wind sway, stylized water, and fire.
The author noted that all assets have been hand-sculpted in Zbrush, retopologized, and textured using Substance Painter/Designer. Inside the pack, you'll find hexagonal-terrain pieces, trees, foliage, stone ruins, wooden bridges, and more (more than 80 different individual assets).
There's also a grid-snapping script to create and edit levels along a hexagonal-grid. The process is pretty straightforward: create a blank game object, attach the Hex Tile Grid script, and any prefabs on the SnapHexGrid layer will automatically snap to grid cells.