Here is the full list of all 50 Ace Combat Assault Horizon - there are Enhanced Edition achievements.
Sortied for 50 hours in competitive online or mission co-op.
Obtained an A rank for every mission (free mission).
Destroyed all radar missile defense systems in a short period of time.
Obtained all MVPs.
Defeated a large number of enemies while flying a bomber.
Piloted all aircraft in the game.
Played on all maps in competitive online.
Saved an ally being targeted by hostile players in DFM in competitive online.
Used Trinity to wipe out the enemy (free mission).
Cleared all levels in mission co-op.
Used ASM to destroy 30 ground enemies in competitive online.
Shot down a large number of hostile players in competitive online.
Used an attack helicopter and destroyed 10 missiles or bombs in competitive online.
Used DFM to destroy 10 airborne enemies in competitive online.
Joined the same DFM with two others and shot down a hostile (mission co-op).
Used DFM support or ASM support to join a flight member.
Cleared 1 level in mission co-op.
Cleared all missions.
Protected Washington D.C. from the threat of Trinity, and returned alive.
Pursued the enemy and shot down Major Illich.
Alleviated the attack on Miami and helped Guts bail out.
Successfully pursued 3 enemies with counter maneuvers.
Took down 5 hostiles in a row with an assault chain.
Managed to get Sova 1 to land safely.
Flew through the big hotel's gates.
Protected Moscow from destruction, freeing it from enemy control.
Destroyed the air defense system, opening the way for allied pilots.
Destroyed the ICBMs.
Sank the enemy fleet and saved the Russian Prime Minister.
Took down 3 hostiles in a row with an assault chain.
Successfully took off to protect allies amid heavy hostile fire.
Prevented enemy from using Trinity to destroy Derbent.
Wiped out hostile ground forces with ASM.
Eliminated enemy threat from the Suez Canal.
Disintegrated enemy bombers in mid-air, keeping damage to the city to a minimum.
Attempted an emergency landing in a damaged aircraft.
Protected your allies using the gunship, and led a successful attack on the base.
Defeated hostiles with all 3 of the gunship's weapons.
Rescued Major Illich from enemy captivity.
Obtained and destroyed 10 enemies in a helicopter.
Removed enemy presence from the oil field and the base.
Flew beneath a falling chimney.
Took out a large number of hostiles as the door gunner.
Destroyed 5 hostile vehicles from the air as the door gunner.
Ejected from a damaged aircraft.
Destroyed an enemy aircraft using only the standard machine gun while piloting an aircraft.
Successfully focused on 3 targets.
Took down 5 hostiles with a direct shot.
Successfully switched from defense to offense 10 times with counter maneuvers.
Took down a hostile fighter with a charged homing missile.