How do menu aliases work in Joomla3?

Question

Joomla

This is how my menu is built:
Item title and alias
Windows - alias windows
_____Games - alias games
_____Programs - alias apps
Linux - alias linux
_____Games - alias games
_____Programs - alias apps
macOS - alias windows
_____Games - It was no longer possible to make an alias games ( Save failed due to error: Another menu item with the same parent already contains this alias)
_____Programs - apps alias
How can I implement the site structure in this way:
domain.rf / operating system / category (games, programs, etc.) ) / subcategory
You need to do it in such a way that each OS has the same alias games, apps, download, blog, forum. Please help me fix this, thanks in advance!