Dark Earth is set in a post-apocalyptic Earth where the sky has gone dark due to a great meteor impact. Small openings in the dark clouds are the only safe places from creatures suffering from a mutating sickness. Cities, called Stallites, are built in these safe havens. You play the game as Arkhan, a defender of his city, who has been poisoned and will soon succumb to the dark sickness. Can you find a cure (or at least, some answers) in time?