Shake the game to display the "Enter Cheat Code" screen. Then, activate the following cheats by entering the corresponding codes:
|All extra rewards
||Enter pay tribute to your king as a code.
|Construction costs set to $0
||Enter i am weak as a code.
|High tech industries
||Enter nerdz rule as a code.
|Recycling plant, waste to energy incinerator and normal incinerator
||Enter garbage in, garbage out as a code.