Cheat mode
Spend the indicated amount of Intel points at the "Special Features" menu to acquire the corresponding cheat. To activate them, pause the game, then select the "Enter Cheat Code" selection at the options menu. If you entered the code correctly, the name of the code will appear. Repeat the code to disable its effect.

Ghost Mode (250 Intel Points): Press Up(2), Left, Right, Down(2).
Team God Mode (450 Intel Points): Press Left, Down, Up(2), Right, Left.
Fast Movement (450 Intel Points): Press Left(3), Right(3).
Infinite Ammo (550 Intel Points): Press Up, Down, Up, Down, Left, Right.
Infinite Items (550 Intel Points): Press Left, Right, Left, Right, Up, Down.
God Mode (600 Intel Points): Press Up, Right, Left, Up, Down(2).
One Shot Kills (600 Intel Points): Press Up(3), Left(3).
Increased Force (650 Intel Points): Press Right(3), Down(3).
Invisible (900 Intel Points): Press Down(3), Up(3).