Cheat Turok Evolution

Be Invincible:
Go to the Enter Cheat screen and enter EMERPUS for a code. Then turn on that cheat at the menu to activate it.

Get Every Weapon (Weapons must be available in current level):
Go to the Enter Cheat screen and enter TEXAS for a code

Unlimited Ammo:
Go to the Enter Cheat screen and enter MADMAN for a code

Pick level:
Go to the Enter Cheat screen and enter SELLOUT for a code. Now you need to load a saved game to pick the level

Be invisible:
Go to the Enter Cheat screen and enter SLLEWGH for a code.