Knife Edge: Nose Gunner Cheats

Super Hard Level Difficulty:
On the logo screen hold "L + R + C-Up and then press C-Right, C-Left, B. Then choose this from the difficulty settings.
Level Select:
Select Story/Team mode then hold C-Left + C-Right + C-Up + C-Down + R and then press Right, Up, Left, + then Down when the level number is displayed.

Game Shark Codes:
Level 11 Vulcan Cannon - 801239B3 000A
Infinite Armor - 8011D46F 0003
Infinite Bombs - 8011D46F 0003
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