Here is the full list of all 22 Aces in the Dust achievements.
Complete Mission 2 without losing any characters
Finish the tutorial without defeating any enemies
Complete Mission 1 without losing any characters
Complete the full game
Complete Mission 1
Complete Mission 1 without taking damage
Defeat the armored enemy train
Complete Mission 2
Lose all three characters for the first time
Defeat all enemies in the tutorial
Complete the tutorial without losing any characters
Complete the Tutorial without taking any damage
Get all the achievements
Complete the tutorial
Kill your first enemy!! Well done!!
Defeat 1.000 enemies
Defeat 3.000 enemies
Defeat 10.000 enemies
Defeat 10 enemies in the shortest time possible
Complete Mission 2 without taking damage
Complete Mission 1 without using secondary weapons
Complete Mission 2 without using secondary weapons