Hidden FMV sequence -
Insert Disc 2 and run the "Bink" file in the "/data/movies" folder.

Cheat Codes -
While playing a game, press ~ to display the console window, then enter one of 
the following codes to activate the corresponding cheat function:

Result - Cheat Code
God mode - vivalahelvig 
All weapons and ammunition - bighugmug 
Flight mode - heehoo 
Alternate view - camera[1-3] 

Note: God mode may become disabled when moving into certain new areas. Also, 
you may not be able to use weapons when wearing a disguise in some levels.