Для openSUSE Tumbleweed запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:ccgx/openSUSE_Tumbleweed/home:ccgx.repo
zypper refresh
zypper install keepassxc
Для openSUSE Slowroll запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:ccgx/openSUSE_Slowroll/home:ccgx.repo
zypper refresh
zypper install keepassxc
Для 16.0 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:ccgx/16.0/home:ccgx.repo
zypper refresh
zypper install keepassxc