Steam, wine and dosbox with them, you can effectively play any game worth playing. Beyond that I never needed to know.

Worst case scenario:

ls

ls (hd0,msdos1)/boot/

set root=(hd0,msdos1)

insmod normal

normal

insmod linux

linux /boot/vmlinuz-6.6.6 root=/dev/sda1

initrd /boot/initrd.img-6.6.6

boot

Or Guix

And honestly when grub is your bootloader. The only thing that you can’t fix in grub is if you forget the crypto-module and can’t do cryptomount (hd0,msdos1); insmod normal; normal

Not every version of chmod supports that and you really don’t want your media files to be executable

Well sudo find ${path} -type d exec chmod 750 {}; to fix the folders first Then sudo find ${path} -type f exec chmod 640 {}; to fix the files

After that sudo chown -Rv my user:media ${path} and everything should be sorted

Unfortunately the XSettings freedesktop spec is trash and hasn’t been released let alone revised since 2001