Cheat codes:
Enter one of the following during game:
ww2god -- Invincibility.
ww2blood -- All weapons and things.
ww2showmap ?- All of the map.
ww2clip -- Walk through walls on/off.
ww2rate -- Shows framerate.
ww2debug -- Debug mode.
ww2level### -- Jump level, where ### is episode and level.
