While playing on single player game (it can also be done on multiplayer *see below) press "Enter" and type the cheat codes, then press again "Enter".

Cheat code-- Effect
x marks the spot--reveals map
medium rare please--gives 10,000food
give me liberty of give me coin--gives 10,000coin
--gives 10,000wood
nova & orion--gives 10,000xp
speed always wins--everything if faster(even for the enemy, so watch out). Disable=repeat
this is too hard--win level on campaign mode
tuck tuck tuck--a Monster Truck spawn in your town center
ya gotta make do with what ya got--a big bombard will spawn in your town center, it fires hippos.
sooo good--when a unit is killed you will be able to know by who it was killed
A recent study indicated that 100% of herdables are obese--all herdable animals on map will be fat.

*While playing online the host must eneble cheat codes, but thats not necessary in Single Player. Hope ya enjoy the cheat codes.