Follow these steps in order.

1. Choose training mode from the main menu

2. Start training in fighter mode (the option on the far right of the three choices)

3. Play through until you begin target training on two droids

4.Destroy the two droids, then immediatly quit out of Training mode to the main menu

5.Start a game in story mode or continue using any mission

Then you should be invincible.

Bronze Cross Medal

Destroy 50 Battle Pods



Distinguished Service Medal

Complete the Enemy Within mission



Gold Cross Medal

Complete the Silver Cross medal set and destroy 100 Battle Pods



Gold Nova Medal

Complete the Vengeance mission three times



Jolly Roger Medal

Complete the Party Crashers mission three times



Master Airman Medal

Destroy 100 Fighter Pods



Meritorious Service Medal

Complete the Force of Arms mission



R.D.F. Flying Ace Medal

Complete the Master Airman medal set



R.D.F. Starburst Medal

Complete all Boss missions two times



R.D.F. Supernova Medal

Complete Gold Nova medal set



Robotech Marksman Medal

Kill 50 Nousjadel-Ger in Sniper Mode



Silver Cross Medal

Complete the Bronze Cross medal set and destroy 75 Battle Pods



Silver Shield Medal

Use the VF-1A to complete the Graveyard mission



Southern Cross Medal

Complete the Gold Cross medal set



Superior Defense Medal

Complete the Attrition mission



Titanium Medal Of Valor Medal

Complete the Knife's Edge mission



Wolf Leader Medal

Complete the To The Death mission