"53 tile sheets for a wide range of 30’s, 40’s, and 50’s inspired environments. There are tiles for interiors, exteriors, trains, houses, hospitals, shops, industrial areas, office spaces, vehicles, schools, and more. Most tiles come in both orthogonal and isometric perspectives."
The characters and monsters I can see being in isometric, as you mentioned they face all 8 perspectives you need. However, the tiles themselves are not. Is this by design? My idea of isometric would be like the image I have posted below. Is there anyway to get your images to show up like they are below? Or am I misunderstanding something?
MOST tiles, when you look at the tile sheets, indeed the majority of everything comes in both facings. For grounds I use decal/splat tiles which can really be used in either or both capacity simultaneously as they have faded edges which allow for them to blend in with other textures. I do have more rigid tiles (in diagonal) in the newer 2.5D asset packs. If you haven't checked it out, you can download the Infernus tileset for free and find those kinds of tiles as well.