During gameplay, hold ALT and type WAR. Release ALT and type in these codes:

rearm = Rearm active unit
combo = Disable fog of war/view entire map/quickbuild/$1 million and 1,000 RUs
godmode = God mode
viewmap = View entire map
veteran = Upgrade active unit
autowin = Kill all enemy units
toggleai = AI toggle
dolemite = Max out active unit
paulhaney = Unknown
togglefog = disable fog of war
dogeatdog = Double power output
moremoney = $1 Million and 1,000 RUs
loadunits = All units and buildings available
quickbuild = Quick build
showdanger = Show Danger
wincampaign = Win campaign
forceresync = Force network resync
lockandload = Rearm all units (including enemies)
enemypowerup = Give enemy a Command HQ
killactiveunit = Kill active unit