A Pack which can allow you to play in a world where you must fight agaisnt aliens and predators to survive start with basic wood and stone tolls and then move up to iron and then the many different higher meaterials availible in the modpack to slowy build a safe haven for you and your friends to survive this deadly planet work on the power or you could make a automated farm or fight off the alien menace your choice slowly go from a caveman to building high tech rockets and traveling to the moon and other plantes