Enter the following at the Password screen:

ger1eng5      All levels unlocked
defaultm      No levels unlocked
alltimes      All daily events
coretimes     All core events 
farleymydog   No core events except current
Boston        First person view  
Foxy          Overhead view
Dino          Unlimited money or rocks
Muffin        Change guard size
Quincy        Change guard awareness
Fatty         Cannot be shot
   
 

Thanks to Revolution readers brecht taghon and alexoo7!