Hegemony 268BC has only two active modders working on it, and yet if there's a more ambitious mod in terms of scope, I've yet to play it. The upcoming version has all the usual "cool" features (Kingdom Management, sea travel, etc) but doesn't neglect the cosmetic appeal of the game (20+ playable factions, plenty of custom scenes for each culture, new weapons, new maps, etc). Also, they have Spartans (although there isn't a "Spartan Faction"). How could you resist storming the battlefield with an army of SPARTA!ns?