0 A.D. (pronounced "zero ey-dee") is a 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 ancient civilizations, each depicted at their peak of economic growth and military prowess.
SpaceZero is a RTS 2D space combat game for two players over a network. The objective is to conquer the space, defeating all enemies. At the starting point, you have only one ship and one planet, but you have money to buy more ships to conquer more planets. All the ships can be controlled by the computer (automatic mode) or by the player (manual mode). You can easily change among your ships, controlling all of them independently.