Para openSUSE Tumbleweed execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:ykoba/openSUSE_Tumbleweed/home:ykoba.repo
zypper refresh
zypper install sfml2
Para openSUSE Leap 42.3 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:ykoba/openSUSE_Leap_42.3/home:ykoba.repo
zypper refresh
zypper install sfml2
Para openSUSE Leap 15.1 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:ykoba/openSUSE_Leap_15.1/home:ykoba.repo
zypper refresh
zypper install sfml2
Para 15.5 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:ykoba/15.5/home:ykoba.repo
zypper refresh
zypper install sfml2
Para 15.4 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:ykoba/15.4/home:ykoba.repo
zypper refresh
zypper install sfml2