Easy mode:
Hold Up/Right + X + Square, then press Start at the "Press Start Button"
screen. Enemy attack and defense power will be reduced by half, and more time
will be available to complete each level.

Hard mode:
Press L1, R1, L2, R2, Square, X, Triangle, Circle at the title screen. Flight
mode: Complete the game in less than 1:30:00. Hold L2 + R2 and press X on
controller two. Then, during game play, press R2 on controller one to climb, and
L2 to dive.

Bonus options:
Complete the game in less than 1:30:00. Options to play FMV sequences, sound
effects, and other selections will become available.

End game bonus:
After completing the game, regardless of time required, hidden areas will be
visible on the map. Additionally, you will retain weapons and ammunitions.
However, SAPUs will be reduced by half.

Flight Mode:
Beat the game in less than 1:30:00. Then, hold L2 + R2 and press X on controller two. Now while
playing a game, press R2 on controller one to climb, and L2 to dive.

Control Map-Movement
Pause the game and enter the "Map" option. Then, press Select to stop the map movement. Now press
L1, L2, R1, R2, and the D-pad to move around the map.

Skip Level:
Load a saved game and repeatedly tap Start until the save game message appears. Then, choose "No" to
continue a game at the next level.

Reset Game:
While playing a game, press L1 + L2 + R1 + R2 + Select.