While playing a game, press [Ctrl] + [Alt] + C to display the cheat menu. Then, 
enter one of the following case-sensitive codes to activate the corresponding 
cheat function:

Result | Cheat Code
Pack of tomb robbers looking for burial provisions appear | Jail Break 
Hailstorm pelts your city | Hail to the Chief 
Swarms of locusts eat every crop in sight | Crop Busters 
Plague of frogs descends upon city | Amphibious Assault 
Pyramids built at quicker pace | Ancient Astronauts 
Life-giving river turns to blood | Crimson Tide 
Mummies appear from monuments and attack city | Mummys Revenge