Submit the name SOYINCAPAZ to unlock the cheat mode.
Commandos 3: Destination Berlin – Cheat Codes (English) Free Download
The cheat mode can also be activated during a mission typing SOYINCAPAZ after selecting a commando. Then you have in the game:
[Shift] [X] – Place selected commandos under the pointer
[Ctrl] [I] – Invincibility
[Ctrl] [V] – Invisibility
[Ctrl] [-] – Display frame rate
[Ctrl] [Shift] [N] – Mission skip
[Ctrl] [Shift] [X] – Destroy all opponents