Robotech: Battlecry

Complete the Enemy Within mission. Note: This also unlocks the Rick mech colors.

Complete the Silver Cross medal set and destroy 100 Battle Pods.

Complete the Vengeance mission three times.

Enter Training Mode.
Select Fighter Training
Shoot down the first two targets then immediately pause and quit Training Mode.
Now begin story mode.
You should now be indestructable.

Complete the Party Crashers mission three times. This also unlocks the Skull Leader mech colors.

Destroy 100 Fighter Pods.

Complete the Force of Arms mission. Note: This also unlocks the Izzy mech colors.

Complete the Master Airman medal set. Note: This also unlocks Debris Field versus mode level and Max mech colors.

Complete all Boss missions two times. Note: This also unlocks the Flood City versus mode level.