Cheat mode:
     Select  "Options"  at  the main menu, then select "Cheats". Then,
enter   the  following  codes  to  activate  the  corresponding  cheat
function.

Cheat code:        Effect:
FeralAttack        Use Feral Attack Earlier in the Game
GiveMeTheMaps      Unlock all maps
Bloodlust          Infinite Feral Attacks
ImJackCarver       Restore Health
UnleashHell        Infinite Ammo