Cheats

[Dark]

not as far as i know
you can hack the game files tough :p

Well now i need a tool.

you dont need a tool for it, only notepad (or similar text editor) + common sense (there goes my chance to do it :p) and some knowledge about angelscript (i thikn it wa scalled)
i dont have penumbra installed atm but when you go to the levels folder there are several files wich have the same name, the smallest one is the script file for that level

example: in the overture demo you could make the wolf a normal enemy that kills you in a number of hits or remove it completely