Here is the full list of all 21 Warhammer 40,000: Dakka Squadron - there are Flyboyz Edition achievements.
Perform 100 Snap Turns
Perform 200 Snap Turns
Destroy 20 enemy Planes with any Blitza-Bommer plane
Destroy 30 enemy Planes with any Burna-Bommer plane
Destroy 20 enemy Turrets.
Destroy 10 enemy Planes with any Defensive Beam Weapon Weapon.
Destroy 5 enemy targets with any Defensive Turret Weapon.
Perform 200 Maneuvers
Destroy 10 enemy planes while Boosting
Destroy 5 ground targets using any Gun Weapon with any Blitza-Bommer plane
Destroy 100 ground targets with the Burna Bomb Weapon
Complete the tutorial
Destroy 35 Arvus Lighters with any Rokkit Weapon
Destroy 10 enemy Planes with any Beam weapon
Destroy 75 enemy Dakkajets.
Kill 20 enemy Planes with any Burna-Bommer plane.
Destroy 1 enemy plane with any Bomm Weapon.
Destroy 20 enemy Ground Targets with any Dakkajet plane
Destroy 50 enemy Planes with any Rokkit Weapon
Destroy 20 enemy ground targets with any Beam Weapon
Destroy 100 total targets in Fire and Ferget mode