Hidden images:
Insert the game disc into a PC
compatible CD-ROM drive and look in the "Furoku " directory for
several bitmap graphic image files.
Level select:
Successfully complete the game
one time.
Select game speed:
Accumulate more than three
hours of game play.
View attack range:
Accumulate more than twelve
hours of game play.
Change plane speed:
Accumulate more than
forty-eight hours of game play.
More credits:
An additional credit is
available for each hour of game play that is accumulated.
Unlimited continues:
Press L + R when "Insert
Coin" appears on screen to play in arcade mode. To get unlimited
continues, press L + R during game play when you are running low on lives.
