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 six ancient Western civilizations, from Iberia to Persia, 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.
"Outposts" are a new feature. These are cheap, weak structures the player can construct in Neutral territory to give vision over the map. They lose Health over time and are easy to destroy, but are cheap and useful.