Comment # 7 on bug 1230002 from Stefan Hundhammer

And there are at least 7 ISOs to choose from at this location:

  https://download.opensuse.org/tumbleweed/iso/

(filter for "openSUSE-Tumbleweed")

They come in diferent flavors like -DVD, -NET, -GNOME-Live, -KDE-Live,
-XFCE-Live, not to mention -Rescue.

So which one did you use?

Please notice that if you use a NET ISO, that one automatically uses the online
repos (see comment #6). for the DVD ISO, you might choose not to use online
repos, which would restrict you to the packages that are actually on the ISO;
which are certainly a lot less than what's available on the online repos.