Bonus options:
 
Successfully complete all 18 missions, then save
the game. Load the saved game to unlock the 
following new options at the main menu: 
Special Continue
Free Mission 
Trial Mission
Scene Viewer
Music Player

The Special Continue option allows the entire 
game to be replayed with new fighters and weapons,
plus the money earned in the first game. The 
Free Mission option allows any mission to be 
played. The Trial Mission option allows the game 
to be played in either score attack or time attack
modes. The Scene Viewer allows FMV sequences to be
played. The Music Player option allows any of the 
36 songs in the game to be played.

by unknown


X-02 Stealth:

To unlock the X-02 Stealth, you must get an S rank 
on all 18 missions (under normal mode).