0 A.D. is a free, open-source, cross-platform real-time strategy (RTS) game of ancient warfare. It's a historically-based war/economy game that allows players to relive or rewrite the history of twelve ancient civilizations, from Iberia to Mauryan India, each depicted at their peak of economic growth and military prowess. Developed using Pyrogenesis, a ground-breaking new game engine custom-built to suit this project, 0 A.D. will give players a rich and entertaining real-time gaming experience.
the feared Persian elite troops known as the Immortals, or Amrtaka. These 10,000 men were of Persian or Median origin, serving as the Shah-an-Shah's personal guard in times of peace. In times of war they formed the most elite fighting force fielded by the Persian Empire. As a result their equipment and clothing was far better than the average Persian soldier.