For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:MargueriteSu:archlinux-devtools/openSUSE_Tumbleweed/home:MargueriteSu:archlinux-devtools.repo
zypper refresh
zypper install arch-install-scripts
For openSUSE Leap 42.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:MargueriteSu:archlinux-devtools/openSUSE_Leap_42.3/home:MargueriteSu:archlinux-devtools.repo
zypper refresh
zypper install arch-install-scripts