0 A.D. Empires Ascendant Windows, Mac, Linux game
0 A.D. is a free, open-source, cross-platform real-time strategy (RTS) game of ancient warfare. Its a historically-based war/economy game that allows players to relive or rewrite the history of twelve ancient civilizations, from Iberia to Mauryan India...
United Kingdom Wildfire Games Developers Hellenic States Ptolemaic Egyptians Republican Romans Achaemenid Persians
Source: moddb.com