During the game press Enter, then type "peace". Press Enter again to enable cheat mode. Then, press Enter and enter one of the following codes, then press Enter again to activate the corresponding cheat function:
Extra money: moneyfornothing
All research complete: nobelprize1
Full map: beautifulworld
View enemy buildings and units: hereyouare!
Damage center of screen: smash
Large amount of damage on screen: shower