Here are the six secret trophies you can unlock in Ace Combat: Assault Horizon for the PS3.
Check out my other guide if you’re looking for the full list of unlockable trophies in Ace Combat: Assault Horizon.
Calamity (Bronze) – Used Trinity to wipe out the enemy (free mission)
Category 5 (Bronze) – Pursued the enemy and shot down Major Illich
Friendly Fire (Bronze) – Alleviated the attack on Miami and helped Guts bail out
Guardian (Bronze) – Protected Washington D.C. from the threat of Trinity, and returned alive
Patriot (Bronze) – Protected Moscow from destruction, freeing it from enemy control
Sierra Hotel (Platinum) – Obtained all trophies