Age of Empires Series Wiki

One of the Gates to Tartarus

Tartarus is a location in the Underworld, and the place where the Titans are kept. Kronos and some of the other Titans are trying to escape from their prison.

There were four entrances to this location, but they were all closed in the events surround the Fall of the Trident (the campaign of Age of Mythology).

During the events of The New Atlantis, the campaign from The Titans expansion, Kronos uses his servant, disguised as Krios the theocrat, to open one of the gates. He succeeds, but is sent back to Tartarus by his mother, Gaia.

In Greek Mythology, Tartarus is the most unforgiving part of the Underworld, as it is a deep abyss reserved for endless torment and suffering of the wicked, as well as being a prison for the Titans. It is basically the Greek Mythology version of Hell.