For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:opentofu/openSUSE_Tumbleweed/systemsmanagement:opentofu.repo
zypper refresh
zypper install opentofu
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:opentofu/16.0/systemsmanagement:opentofu.repo
zypper refresh
zypper install opentofu
For 15.7 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:opentofu/15.7/systemsmanagement:opentofu.repo
zypper refresh
zypper install opentofu
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:opentofu/15.6/systemsmanagement:opentofu.repo
zypper refresh
zypper install opentofu
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:opentofu/15.5/systemsmanagement:opentofu.repo
zypper refresh
zypper install opentofu