Call of Duty Ghosts is delivered as Steam cd key after your purchase. Call of Duty Ghosts activation and installation is done entirely on Steam. Internet connection is required. Ten years after a devastating mass event, America’s borders and the balance of global power have changed forever. As what's left of the nation's Special Operations forces, a mysterious group known only as "Ghosts" leads the fight back against a newly emerged, technologically-superior global power. Buy Call of Duty Ghosts and start the action immediately.