For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Werwolf2517/openSUSE_Tumbleweed/home:Werwolf2517.repo
zypper refresh
zypper install btop
For openSUSE Slowroll run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Werwolf2517/openSUSE_Slowroll/home:Werwolf2517.repo
zypper refresh
zypper install btop
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Werwolf2517/16.0/home:Werwolf2517.repo
zypper refresh
zypper install btop