While the game is playing, press CTRL, ALT and C, and enter the following codes.

Cheat Code - Granted Wish

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

Note: The codes are case sensitive.