During the 'Media Blitz' mission; at the 5 o' clock expansion, there is a hidden path leading the player to the bottom right corner of the map. The player can find a civilian science facility and destroy it to find documents. Pick it up with any ground unit to unlock a secret mission: Piercing the Shroud. They may play it by using the star map on the Hyperion's bridge. This mission cannot be unlocked post-game. If the player has a save file BEFORE the invasion of Char, they can load it and unlock the mission through the mission archives (only works while the player is still aboard the Hyperion).