RPGMaker folders have the files sorted and organized for the RPGMakers, but they lack some of the stuff like many animated objects! For Unity and all the other softwares, use the stuff outside that it's the 100% of the asset ;)
Viewing post in Modern interiors - RPG Tileset [16X16] comments
Folders are sorted based on your grid size (16x,32x,48)
If you are gonna use a 16x16 grid, these below are the files you need: "interiors_16x16" has all the sprites from the day 1, the "Theme_Sorter" folder has all the sprites from the day 1 but sorted by theme and the "Room_Builder_16x16" has all concerning walls, floors, steps etc.