There has to be a line edited that enables the Debug Menu or console. I just can't find it.
and in:C:\Users\name\Documents\My Games\Dishonored\DishonoredGame\Configthere is a file called DishonoredInput.ini with a line:BaseBindings=(Name="Backspace",Command="ToggleDebugMenu" )
I tried changing both, and even making DefaultInput.ini readonly, nothing happened regardless of what I changed the bind to.
Just add to the input a command for "God 1" and it should give you god mode then.