links and non-default / directories hidden in file open dialog

So, I'm trying to open a video game on my "server" so I can waste some of my valuable time. Anyway, kega fusion uses some file dialog I'm not familiar with and doesn't show my sshfs mounted directory in the file system.

I've attached the image of the file dialog. So, maybe someone can identify it.

Also, I tried making a link (ln -s /dir /home/<username>/dir_link) but the dialog doesn't see the link either.
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