Cheats 
You can activate the full range of cheats in two ways: either naming your profile 
SOYINCAPAZ (all in BOLD!) and starting a new game or pushing Caps Lock during 
a mission and typing it. No confirmation is given. Here is the list of key combos 
and their effects:

CTRL + SHIFT + N = Immediately complete current mission 
CTRL + I = Invincibility 
CTRL + V = Invisibility 
CTRL + SHIFT + X = Kills whatever Nazi is left on the map 
SHIFT + X = Puts the selected Commando under the pointer arrow 
CTRL + minus = Shows the fps (framerate) of the game