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