Samus and the other bounty hunters must instead stop both the Space Pirates and the virus . The bounty hunters , including Samus , receive orders to clear a computer virus from several supercomputers , called Aurora Units , located throughout the galaxy , but the meeting ends abruptly when Space Pirates attack several Federation ships . Samus and the other bounty hunters are deployed to the planet Norion , where the Space Pirates are concentrating an attack on a Federation naval base .