Cheat: Codes

Ghost Mode (Makes you invisible)
Up, Up, Left, Right, Down, Down

Unlimited Ammo
Up, Down, Up, Down, Left, Right

Fast Movement
Left, Left, Left, Right, Right, Right

One Shot Kills
Up, Up, Up, Left, Left, Left

Increased Force
Right, Right, Right, Down, Down, Down

Unlimited Items
Left, Right, Left, Right, Up, Down

Invisible (Can't be detected)
Down, Down, Down, Up, Up, Up