Call of Duty

To enable cheats in Call of Duty you must edit the target line of the shortcut.
Add the following at the end of the line:

+set monkeytoy 0 +set sv_cheats 1

Now during gameplay press [~] to bring up the console and enter the following
codes:

set random sv_cheats 1 Activate cheat mode

give Gives the listed
give health Gives full health
god God mode
notarget The enemies won't shoot you
noclip Walk through walls
give all All weapons and ammo