Select Score Attack or Arcade mode and complete level 5 (Coastal Industrial Zone) with at least a four star rank. The Great River Valley or Sea of Twilight level will appear instead of the usual level that follows. Note: To earn a star, complete a stage with at least 50% shot down. You will lose one star if you are shot down or all stars if you have to use a continue.

Clouds of Twilight level:
Select Score Attack or Arcade mode and complete level 9A or 9B (Iceberg Base or Sea of Clouds) with at least a four star rank. The Great River Valley or Sea of Twilight level will appear instead of the usual level that follows. Note: To earn a star, complete a stage with at least 50% shot down. You will lose one star if you are shot down or lose all stars if you have to use a continue.

EX options:
Unlock the following EX options by performing the correspondign tasks in Arcade mode. Note: These options only affect Arcade mode games.

EX OPTION - HOW TO UNLOCK
5 Game Credits - Get a "Game Over".
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.
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 - Complete Stage 3 Emergency orders.
Automatic Lock-On - Reach the ending ten times.
Automatic Missile Fire - Reach ending "A".
Combo Set Till Death Or Stage Clear - Get a combo totaling 3,000 points.
Combo Window Twice As Long - Get a combo totaling 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 Missile Recovery - Fire a total of 2,000 missiles.
No Missile 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 Missile Recovery - Fire a total of 5,000 missiles.

Hold B until the Sega logo appears in the intro to hear the classic "Sega" voice over.

Unlock the following Avatar Awards by performing the corresponding tasks:

AVATAR AWARD - HOW TO UNLOCK
After Burner helmet - Complete your medal collection.
After Burner Logo T-shirt (female) - Unlock all EX options.
After Burner Logo T-shirt (male) - Unlock all EX options.

ACHIEVEMENT - HOW TO UNLOCK
ROLL (15 points) - Performed a roll in Arcade mode.
Climax Mode (15 points) - Activated Climax Mode in Arcade mode.
50 Combo (20 points) - Got a combo of 50 in Arcade mode.
Stealth bomber (10 points) - Clear Stage 5 in Arcade mode.
Across enemy lines (10 points) - Clear Stage 10 in Arcade mode.
Super Tomcat (20 points) - Clear Arcade mode with the F-14D.
Super Hornet (20 points) - Clear Arcade mode with the F/A-18E.
Strike Eagle (20 points) - Clear Arcade mode with the F-15E.
Emergency Order (20 points) - Clear an Emergency Order in Arcade mode.
Rank In (15 points) - Uploaded a Score Attack score to rankings.
Triple A (30 points) - Got a AAA ranking in Arcade mode (for Shot Down, Combo, or Play Time).
All Clear! (5 points) - Clear Arcade mode with ending A.