Press ~ during game play to display the console window. Then, enter one of the following codes to activate the corresponding cheat function:

Cheat Code - Effect

add_money 20000 - Increase money by 20,000
gamestop - 10% cheaper units in campaign mode
jericho - Walls fall down in siege in battle map mode
oliphaunt - 40% bigger elephants in campaign mode

Note: Gerry Edmonds notified us he had trouble with the money code. Be sure you are on the campaign map before pressing ~. And, do not forget the space between add_money and 20000. This money code can be performed once per game. After the first time, you must save, quit, and restart the game to use it again.