This obelisks appears in the two Campaigns, guarding the Fission Core. The player can try to damage it, but is impossible.
The Retributor Obelisks are, like the Falcon Towers, big towers, however theses obelisks can't be destroyed. The Obelisks founded in the Mission 9 (Sprawler) and 10 (JDA) of the Campaigns Despite this, it has a slow shot rate, so it's necessary so seize these moments in order to attack them. They deal a lot of damage, and can attack air, naval and ground units, so it's necessary to destroy them with lots of units.
This defense towers appears in the Sprawler Campaign in Mission 7, the player must destroy these obstacles in order to proceed with the objectives. It's name comes from aspect of the falcon flying at the top. The Falcon Tower are big towers first found in the seventh mission of the Sprawler campaing. The Falcon Towers at the entrance of the JDA base in the Sprawler Campaign The Jovian Detection Authority have a very powerful technology in all buildings:
