It could not have gone worse. After the devastating attack of the Reticulans in UFO: Aftermath, you only had fifty years of rest until they once again tried to eradicate the human race in UFO: Aftershock - and that time they succeeded. Only around ten thousand people survived this desperate war and only a few were allowed to remain on a station orbiting Earth. Most of the survivors were banished to Mars by the Reticulans.
The demo allows you to test all features of the final game for whole 10 game days.