Talvez essas ferramentas podem te dar inspiração, ou você pode até mesmo comprá-las:

https://store.steampowered.com/app/1036640/RPG_Developer_Bakin/

https://store.steampowered.com/app/592260/Dungeon_Painter_Studio/

https://store.steampowered.com/app/857320/SRPG_Studio/