You can play FreeOrion through a local network or internet. If you decide to play on your own, you must know that the AI hasn't been already developed, so the enemies just wait to be eliminated by your troops.
The maps where the game takes place are maps of different galaxies generated aleatory, although you can choose the shape: ring, spiral, elliptical or irregular, as well as decide the number of stars, age and density of the planets.
Combine natural and human resources and feed your troops and build buildings and spaceships, that's the key to conquer the whole galaxy.
It requires Microsoft .NET Framework 2.0, Windows XP Service Pack 2, 600 MHz processor and 128 MB RAM.