To use a cheat code, press the enter key, type in the code, and press enter again. Note that these codes only work in single-player missions and custom maps.

WarpTen - Speeds construction of buildings and units
IocainePowder - Fast Death/Decay
WhosYourDaddy - God mode
KeyserSoze [amount] - Gives you X Gold
LeafitToMe [amount] - Gives you X Lumber
GreedIsGood [amount] - Gives you X Gold and Lumber
PointBreak - Removes food limit
ThereIsNoSpoon - Unlimited Mana
StrengthAndHonor - No defeat
Motherland [race] [level] - level jump
SomebodySetUpUsTheBomb - Instant defeat
AllYourBaseAreBelongToUs - Instant victory
WhoIsJohnGalt - Enable research
SharpAndShiny - Research upgrades
IseeDeadPeople - Remove fog of war
Synergy - Disable tech tree requirements
RiseAndShine - Set time of day to dawn
LightsOut - Set time of day to dusk
DayLightSavings [time] - If a time is specified, time of day is set to that, otherwise time of day is alternately halted/resumed