You need to activated the cheats listed below, right-click on a commando during gameplay and then type GONZOANDJON From there you can try one of the following combinations.

Effect	Code
Enable Invincibility	[Ctrl] + I.
Enable Invisibility	[Ctrl] + V.
Enable, Display frame rate	[Ctrl] + [Minus]
Place selected commandos under the pointer	[Shift] + X.
Skip a Mission	[Ctrl] + [Shift] + N.
Which will Destroy all opponents	[Ctrl] + [Shift] + X.