Cheat Codes
While playing a game, press the following keys to activate the corresponding cheat function:

RESULT CHEAT CODE
God mode [Ctrl] + [Alt] + [Shift] + [Home]
In-flight reload and refuel (North American version) [Ctrl] + [Alt] + [Shift] + [Insert]
In-flight reload and refuel (International version) [Ctrl] + [Alt] + [Shift] + [F2]

Cow Killer
Pick the mission 7 on campaign #4. When you take off make a heading for 212 degrees (you can read the degree heading by looking on the top of the HUD). Switch your weapon to the JDAM and make sure you are going in the general area of 212 degrees and repeatedly tap tab for radar id you will get lock on a cow called Unidentified Norman 4,3,2,or1, you can get lock on it with your bombs and blow those cows away.

Invincibility
While playing, press Ctrl-Alt-Shift-Home. A small green X will appear in the lower left-hand corner if you did it right.