From the publisher: "Space Frontier is a card game of space exploration. Can you colonize more planets with sufficient resources than the Invader fleet? Choose from several different space ships to create your exploration fleet. Each ship has a different ability that is activated by discovering a planet with a specific resource type. Once two systems have been fully explored (or the Invaders have explored one system), the game ends, and you add up the scores. If your point value is higher than the Invader's points, you win. A variety of Invader ships let you adjust the difficulty of play, and advanced rules allow you to challenge yourself even further. Space Frontier can be played solitaire, or with two players (head-to-head or cooperatively)."