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Shake the game to display the "Enter Cheat Code" screen. Enter one of the following codes to activate the corresponding cheat function.
Construction costs set to $0
Enter i am weak as a code.
All extra rewards
Enter pay tribute to your king as a code.
rtea tecymce vrawm
Recycling plant, waste to energy incinerator and normal incinerator
Enter garbage in, garbage out as a code.
High tech industries
Enter nerdz rule as a code.