Here is the full list of all 45 Aces of the Luftwaffe achievements.
Bomb 2500 targets.
666 confirmed Ghost kills.
Defeat Commander Meiler
Complete all Missions of Chapter 5.
Rack up 25000 kills!
Evade all Mines. (Mission 5-3)
Bomb 3 Axis Airbases with the Allied bomber. (Mission 5-2)
Shoot down 15 Heinkel planes. (Mission 5-1)
Stay stealthy the entire mission. (Mission 4-1)
Rumor has it there's over 70 airborne. (Mission 3-3)
Bomb 40 AA gun nests! (Mission 3-2)
Whatever those things are, kill them. (Mission 3-2)
Bomb 30 AA gun nests! (Mission 2-3)
Bomb all the Axis panzers invading France. (Mission 2-2)
Bomb 500 targets.
Shoot down 25 Bf110 planes. (Mission 3-1)
Shoot down all three of the Super Planes. (Mission 2-3)
Kill a dozen Messerschmitts! (Mission 1-1)
Kill 300 Focke-Wulfs. (Mission 1-1)
Need! Need! Need!
Shoot down all 7 Ghost planes. (Mission 5-2)
Defeat the Mad Scientist. (Mission 4-4)
Complete all Missions of Chapter 4.
Shoot down 10 Zeppelins. (Mission 4-2)
Defeat Oberst Müller.
Complete all Missions of Chapter 3.
7777 confirmed Focke-Wulf kills.
Defeat Major Kohler.
Complete all Missions of Chapter 2.
88 confirmed Ju88 kills.
1337 confirmed Me262 kills.
Shoot down 50 jet planes. (Mission 1-3)
Down half a dozen heavy bombers. (Mission 1-3)
Grab 5000 Medals.
Kill three Heinkel Bombers. (Mission 1-2)
Kill a Fiat BR.20 bomber. (Mission 3-1)
Bomb 100 targets.
Shoot down 5000 planes.
Collect 1000 Medals.
Bomb 6 Axis factories with the Allied bomber. (Mission 2-1)
Defeat General Neumann.
Complete all Missions of Chapter 1.
Dance, dive bombers. Dance! (Mission 1-2)
Collect 48 Power-Ups.
Kill 1000 foes!