Penumbra: Black Plague Cheats (PC)

While playing the game, access Swanson's computer, and run the program "schmup.exe". Enter
"xor451" as a password to play a space shooter mini-game.

Successfully complete the game with all ten secret artifacts collected to get the password
"xor451". Run the "super_secret.exe" file in the game's installation directory, and
enter "xor451" as a password when prompted to view concept art, desktop
backgrounds, and a video.