A single-player map must be loaded before these cheats will work. Press the ~ (tilde) 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           Result
aliens         Show All Animals on GPS 
daredevil      Prey Becomes Passive 
theflash       Move Super Fast 
shine          Sun Shines Brighter 
rainman        Make it Rain 
matrix         Unknown Effect