Для openSUSE Slowroll запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/Emulators/openSUSE_Slowroll/Emulators.repo
zypper refresh
zypper install allegro
Для 16.0 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/Emulators/16.0/Emulators.repo
zypper refresh
zypper install allegro
Для 15.6 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/Emulators/15.6/Emulators.repo
zypper refresh
zypper install allegro