The year is 2313. Thanks to the development of intrasystem subspace jump drives and communications relays, Terrans have extended their reach throughout the solar system as never before. But with new opportunities come new risks, and no one can predict exactly what may happen on a given day. Fly as a new recruit to the Lunar Defense Force and defend the Lunar Republic from the growing threat of open war. Pirates, renegade factions, and natural phenomena will test your skills. But be prepared for a historic event that will change the fate of the human race forever...