Knife Edge:Nose Gunner
Level Select
Select "Story" or "Team" mode, then hold C-Left + C-Right + C-Up + C-Down + R and press Right, Up, Left, Down when the level number is displayed.
Credit Goes To: Jwrath@aol.com via N64cc


 Level Select
 Hidden Difficulty
Hidden Difficulty
Enter the following command while the Kemco logo appears on screen:
While holding R, L and C Up, press C Right, C Left and B.
This will open up the hidden Super Hard difficulty mode.
Credit Goes To: IGN 64