This mod focuses on the Persian Wars from the Greek side but goes on for 500 years after that. It has developed Greek, roman and Persian factions and as detailed Keltoi as I have been able to find information on. There are no current screens, but here is a rough idea of what has been done:
All new factions: The Ionian Revolt, Makedon, Rome, The Persian Empire, Egypt, The Western keltoi, The Germanic Keltoi, The Hellenic Barbarians, The Italian Barbarians, Sparta, Athens, Thebes, The Phoenicians, The Affrican Tribes, The Steppe-Peoples and the Anatolian Barbarians
Loads of new units such as Cohortes Reformatae, Cohortes Evocatae, Keltoi R