Para openSUSE Tumbleweed corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:ChristianMauderer:opensuse-installations:freecol/openSUSE_Tumbleweed/home:ChristianMauderer:opensuse-installations:freecol.repo
zypper refresh
zypper install freecol
Para 15.6 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:ChristianMauderer:opensuse-installations:freecol/15.6/home:ChristianMauderer:opensuse-installations:freecol.repo
zypper refresh
zypper install freecol