Penumbra Black Plague [cheats/hints]
Bonus material
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.
Space shooter mini-game
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.
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