Here is the full list of all 19 Wing of Darkness achievements.
Earned all Achievements.
Cleared every mission in the game without ever being shot down.
Fired a total of 50,000 or more rounds from the primary weapon.
Shot down over 90% of the enemy aircraft that appeared in each mission.
Fired a total of 500 or more rounds from the secondary weapon.
Fired a total of 5,000 or more rounds from the tertiary weapon.
Hit a total of 1,000 times or more.
Shot down over 200 non-Fraulein enemy aircraft. (Excluding Practice Mode)
Shot down over 500 non-Fraulein enemy aircraft. (Excluding Practice Mode)
Shot down over 100 enemy Frauleins. (Excluding Practice Mode)
Shot down over 500 enemy Frauleins. (Excluding Practice Mode)
Shot down over 1,000 enemy Frauleins. (Excluding Practice Mode)
Cleared Prologue.
Cleared Chapter 1.
Cleared Chapter 2.
Cleared Chapter 3.
Cleared Chapter 4.
Cleared Chapter 5.
Viewed the Abendflugel's battle.