A single-player map must be loaded before these cheats will work. Press the [~] (Above the TAB key) key while playing then type "/cheat CODE" where CODE equals the cheat code you want to enter. Enter the same code again to deactivate the cheat.
Code - Effect
aliens - Show All Animals on GPS
daredevil - Prey Becomes Passive
matrix - Unknown Effect
rainman - Make it Rain
shine - Sun Shines Brighter
theflash - Move Super Fast