For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:thiagomacieira/openSUSE_Tumbleweed/home:thiagomacieira.repo
zypper refresh
zypper install icecream
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:thiagomacieira/16.0/home:thiagomacieira.repo
zypper refresh
zypper install icecream
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:thiagomacieira/15.6/home:thiagomacieira.repo
zypper refresh
zypper install icecream