Hold
[Left Shift] + [Right Shift] and type "desertwatch" to unlock the
cheat
menu at the options screen.
While
playing, pause the game play and jump to the options screen.
You
will see the unlocked "Cheats" option at the options menu. Pick
on
"Cheats" option, after you can select "Trooper Level",
"Enemy AI",
and
"Mission List" cheat options.
Last
resort attack on SCUDs
Place
sniper rifle in the launch position to blow up SCUDs.
Shoot
the rocket a few times with it.