All Weapons
Pause game play, then hold L and press Right, B(2), Y, B. A message will confirm correct code entry. Repeat the code to disable its effect. Only weapons normally available in the current level will be unlocked.
Invisible Mode
Pause game play, then hold L and press Up, Left, Right, Up, B. A message will confirm correct code entry. Repeat the code to disable its effect.
Slow-motion Mode
Pause game play, then hold L and press Left, Down, Up, Right, B. A message will confirm correct code entry. Repeat the code to disable its effect.
Fish Eye Camera
Pause game play, then hold L and press Left, Up, Right, Down, B. A message will confirm correct code entry. Repeat the code to disable its effect.
Beagle Holes, Footprints, And Burns
Pause game play, then hold L and press Down, Up, B, Y, B. A message will confirm correct code entry. Repeat the code to disable its effect.
Alternate Fade
Pause game play, then hold L and press Right, Up(2), Down, B. A message will confirm correct code entry. Repeat the code to disable its effect.
Alternate Lighting
Pause game play, then hold L and press Up, Right, Up, Down, B. 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.