Nomad Fleet is a RTS game for PC, Mac and Linux where you lead the last remnants of Mankind to safety after a mysterious alien race has hunted them near extinction. Lead a fully armed fleet of battleships, carriers and fighters across several random encounters where they must fight for their survival while scavenging for resources, trading and researching new technologies.
Sometimes you'll find trade convoys or other similar non hostile aliens that will be willing to trade with you. In the final version you will also be able to engage in piracy against them, just be ready to deal with the consequences.