Heralder No More:
Destroy a Heralder aircraft on any difficulty

Broken Falchion:
Shoot down a Falchion aircraft on any difficulty

Champion of Praxor:
Finish the second stage on any difficulty

Destroyer:
Destroy 500 aerial opponents on any difficulty

Defender of Khara:
Finish the fourth stage on any difficulty

Ground Sweeper:
Destroy 200 Draelus ground structures on any difficulty

Searer Extinguished:
Destroy the Searer on Tolak on any difficulty

Master of Arms:
Unlock the final ship on any difficulty

Savior of Tolak:
Finish the sixth stage on any difficulty

Don’t You Die On Me (hidden)
The friendly rebel Heralder must survive through the end of Khara (Stage 3)

Abrupt Ending (hidden)
Prevent the Harbinger from reaching its final destination 

Perfectionist (hidden)
Finish the game without failing a single objective on any difficulty

Challenger:
Defeat the game on RECRUIT difficulty or higher

Reckoning Force:
Defeat the game on SOLDIER difficulty or higher

Unstoppable:
Defeat the game on VETERAN difficulty or higher

Legendary:
Defeat the game on HARDCORE difficulty

Thanks to Kevin at TikiGames for the hidden Trophies.