For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:kleinrob:mpip/openSUSE_Tumbleweed/home:kleinrob:mpip.repo
zypper refresh
zypper install emacs-mew
For openSUSE Leap 42.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:kleinrob:mpip/openSUSE_Leap_42.1/home:kleinrob:mpip.repo
zypper refresh
zypper install emacs-mew
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:kleinrob:mpip/15.4/home:kleinrob:mpip.repo
zypper refresh
zypper install emacs-mew