Starcraft II Secret Mission
Our crack walkthrough writer Phil Hornshaw made this information available in his excellent Starcraft II Walkthrough, which has been up and running since release. Nevertheless, we wanted to take the time to dedicate a post exclusively to the pleasures of this hidden campaign mission. If you’ve been wondering why your “completed missions” statistic reads “25/26,” wonder no more.
In the bottom-right (SE) corner of the Media Blitz map is a red science building, labeled as being under control of the “Korhal Citizens.” Make sure to keep Odin (the big war machine) alive past the beginning of the mission, and take a detour to the right when you head northeast from your HQ to take out the Dominion base. By commanding your troops to destroy the science building, you’ll reveal clickable “Secret Documents” that unlock a Warcraft III-style bonus mission! Make sure you complete this mission before you reach the endgame — you’ll need access to the Star Map to make it happen.