All weapons
Press Start to pause game play, then hold L and press Right, X(2), Y, X. A message will confirm correct code entry. Note: Only weapons normally available in the current level will be unlocked.
Slow motion
Press Start to pause game play, then hold L and press Left, Down, Up, Right, X. A message will confirm correct code entry.
Beagle holes, footprints, and burns
Press Start to pause game play, then hold L and press Down, Up, X, Y, X. A message will confirm correct code entry.
Alternate lighting
Press Start to pause game play, then hold L and press Up, Right, Up, Down, X. A message will confirm correct code entry.
Invisible Mode
Press Start to pause game play, then hold L and press Up, Left, Right, Up, X. A message will confirm correct code entry. Repeat the code to disable its effect.
Alternate Fade
Press Start to pause game play, then hold L and press Right, Up(2), Down, X. A message will confirm correct code entry. Repeat the code to disable its effect.
Fish Eye Camera
Press Start to pause game play, then hold L and press Left, Up, Right, Down, X. A message will confirm correct code entry. Repeat the code to disable its effect.
Level 2: Easy Completion
When the spotters see you, they will call in an air strike. After you kill the first spotter, hide under the bridge.