Type "gonzoopera" to enable cheat mode and enter one of the following codes:
Invincibility: Ctrl + L
Mission skip: Ctrl + Shift + N
Place selected commandos under the pointer: Shift + X
Trace user: Shift + V
Destroy everything: Ctrl + Shift + X
Invisibility: Ctrl + I
Mission editor: Shift + E
Select video mode: Shift + F1 through F4
View debug output: Ctrl + F9
Display terrain information: F9
Picte interface: Alt + I
Write data to "memlin.dat": Alt + Shift + L
Write data to "memact.dat": Alt + Shift + M