Cheat Codes
Bring up the talk bar by pressing T then enter codes as written here:

eyeofgod: Allows extra level of zoom on lower-level machines

saladtossed: Choose any mission (enter the code, exit the current mission to the Main Menu, press the CTRL+H+W keys simultaneously, then click on Load and a mission)

twobyfour: Builds any unit (for example, twobyfour dragoon for a Dragoon Tank—most of the names are logical, but some use a British spelling for "centre," "defence," and so on)

hermes: Speeds up ordering of units

donkeys: Anything that shoots missiles now shoots Jeeps instead

morningafter: Removes the "fog of war" from the entire map

gimmiegimmie: Allows you to build everything, even without a Command Center/Command Complex

unclejohn: God mode (your units can’t be destroyed)

chaching: Adds $10,000 to your resources

mrmuscle: Upgrades your armor percentage

bigsofty: Downgrades your enemy’s armor percentage

coffee: Upgrades your speed percentage

beer: Downgrades your enemy’s speed percentage

shaft: Upgrades your firepower percentage

shank: Downgrades your enemy’s firepower percentage