These can be unlocked while playing through Arcade Mode and only take effect while playing Arcade Mode.

Unlockable	How to Unlock
5 Game Credits	Get a Game Over one time
7 Game Credits	Get a Game Over three times
9 Game Credits	Get a Game Over five times
Aircraft Count Decreased to 1	Play a Secret Stage five times
Aircraft Count Increased to 5	Play a Secret Stage one time
Aircraft Count Increased to 9	Play a Secret Stage three times
Aircraft set to Highest Speed	Play through four different branched stages
Aircraft set to Slowest Speed	Play through all eight different branched stages
All Smoke Not Displayed	Score over 1,000,000 points
Always Advance to Secret Mission 14	Play Emergency Orders twenty times
Armor set at 1%	Get a down rate of 70% twenty times
Automatic Gun	Clear Stage 3 Emergency orders
Automatic Lock-On	Reach the ending ten times
Automatic Missle Fire	Reach ending 'A'
Combo set till Death or Stage Clear	Get a combo totalling 3,000 points
Combo Window Twice as Long	Get a combo totalling 1,000 points
Enemies No Longer Attack	Shoot down 10,000 enemies
Enemy Attack Leveled Down One Time	Shoot down 1,000 enemies
Enemy Attack Leveled Down Three Times	Shoot down 5,000 enemies
Enemy Attack Leveled Down Two Times	Shoot down 3,000 enemies
Fast Climax Gauge Recovery	Activate Climax Mode 50 times
Gun power Down	Shoot down 200 enemies with your guns
Gun Power Up	Shoot down 50 enemies with your guns
Hide User Interface	Score over 2,000,000 points
Invincibility against Enemy Fire	Get a down rate of 70% fifty times
Large Lock-On Cursor	Reach the ending one time
No Explosion Smoke Displayed	Score over 800,000 points
No Lock-On Cursor	Reach the ending five times
No Missle Recovery	Fire a total of 2,000 missiles
No Missle Smoke Displayed	Score over 600,000 points
Slow Climax Gauge Recovery	Activate Climax Mode 100 times
Take Half Damage	Get a down rate of 70% ten times
Unlimited Climax Gauge Recovery	Activate Climax Mode 200 times
Unlimited Game Credits	Get a Game Over ten times
Unlimited Missle Recovery	Fire a total of 5,000 missiles