Press [F2] during the game and type in:

 dh5find       Takes you to nearest animal
 dh5findnext   Takes you to next nearest animal
 dh5nofear     Animals are not afraid of you
 dh5water      Rain
 dh5zeus       Lightning
 dh5leaves     Blowing leaves
 dh5truck      Player drives a truck
 dh5beacon     Attracts deer to you
 dh5showme     Shows deer on the map
 dh5damper     No Noise
 dh5thor       Thunder