Hi all,
    after about 7 years upstream has released a new version of Tecnoballz:
http://linux.tlk.fr/games/TecnoballZ/download/

At the time, Hans De Goede was so kind to provide a patch to drops additional rights ASAP:
https://bugzilla.redhat.com/show_bug.cgi?id=234563#c4
http://pkgs.fedoraproject.org/cgit/tecnoballz.git/tree/tecnoballz-0.92-dropsgid.patch

Unluckily the code changed a lot and I don't have the knowledge to adapt this patch to the new version.

I hope someone can help me once again.

Thanks,

Andrea