Para openSUSE Tumbleweed execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:Factory:git-workflow:staging:llyyr:gamescope:10/openSUSE_Tumbleweed/devel:Factory:git-workflow:staging:llyyr:gamescope:10.repo
zypper refresh
zypper install gamescope
Para openSUSE Slowroll execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:Factory:git-workflow:staging:llyyr:gamescope:10/openSUSE_Slowroll/devel:Factory:git-workflow:staging:llyyr:gamescope:10.repo
zypper refresh
zypper install gamescope