Start the game normally. When in the game window type: arno -
No confirmation will appear.
Confirmations will appear on these:
Code Effect
Ctrl + F3 Freeze all on/off Ctrl + F4 God Mode on/off Shift + F4 Invisibility Ctrl + F4 More ammo (retype for even more) Ctrl + F12 Win current mission Shift + F10 X / Y position of the pointer