Для openSUSE Leap 15.6 standard запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:goupilmtos:games:tools/openSUSE_Leap_15.6_standard/home:goupilmtos:games:tools.repo
zypper refresh
zypper install slade
Для openSUSE Leap 15.5 standard запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:goupilmtos:games:tools/openSUSE_Leap_15.5_standard/home:goupilmtos:games:tools.repo
zypper refresh
zypper install slade
Для Goupilmtos15.6 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:goupilmtos:games:tools/Goupilmtos15.6/home:goupilmtos:games:tools.repo
zypper refresh
zypper install slade
Для Goupilmtos15.5 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:goupilmtos:games:tools/Goupilmtos15.5/home:goupilmtos:games:tools.repo
zypper refresh
zypper install slade