As Blizzcon approaches, a number of gaming sites were invited out to California to get an early look at the single-player campaign for StarCraft II: Wings of Liberty. Kotaku has a detailed write-up (spoiler-free version), and 1Up summarizes one of the missions: "... you're on a planet with an alternating day/night cycle (every five minutes, it switches): during daylight, you're safe. You can build forces and go out and destroy structures. At night, the infected Terrans will relentlessly stream towards your base — necessitating a strong defense against the 'zombie horde.'" An interview with some of the developers is available, in which lead designer Dustin Browder says Blizzard will continue their trend of having downloadable maps and other improvements throughout the game's life. BlizzPlanet posted a mission guide for the part of the game they got to see, and new video footage has been released that shows off the single-player mode.