Returning from a secret diplomatic mission, the Astro-Cruiser Star Voyager receives an urgent stellar communication: "Zakor has betrayed new treaty. Capital Starport under siege. Relief imperative. Return immediately. Caution: Zakoran enemy ships patrol the seven star portals. Energy supplies limited: Refuel at each star portal. Hurry!"
--From the Atari 2600 Star Voyager instruction manual.