Для openSUSE Tumbleweed запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:ykoba:multimedia/openSUSE_Tumbleweed/home:ykoba:multimedia.repo
zypper refresh
zypper install supertux2
Для openSUSE Leap 15.1 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:ykoba:multimedia/openSUSE_Leap_15.1/home:ykoba:multimedia.repo
zypper refresh
zypper install supertux2
Для 15.5 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:ykoba:multimedia/15.5/home:ykoba:multimedia.repo
zypper refresh
zypper install supertux2
Для 15.4 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:ykoba:multimedia/15.4/home:ykoba:multimedia.repo
zypper refresh
zypper install supertux2