Here is the full list of all 52 Sid Meier's Ace Patrol achievements.
Earn 50,000 points with a German squadron
Destroy an enemy supply train
Win an Offensive as the Germans
Shoot down 3 planes with 1 pilot in 1 mission: Leader
Win a Mission at Leader difficulty level
Win a Mission at Pilot difficulty level
Earn 10,000 points with a German squadron
Earn 5,000 points with a German squadron
Earn 5 Victories with a German Pilot
Win the Campaign as the British
Earn 100,000 points with a British squadron
Create a Squadron with four aces
Shoot down 3 planes with 1 pilot in 1 mission: Ace
Earn 50,000 points with a British squadron
Win an Offensive as the British
Shoot down an enemy zeppelin
Earn 15,000 points with a British squadron
Earn 10,000 points with a British squadron
Win a Mission at Ace difficulty level
Earn 5,000 points with a British squadron
Earn 5 Victories with a British Pilot
Earn 5 Victories with a American Pilot
Earn 5 Victories with a French Pilot
Earn 50 Victories with a German Pilot
Earn 50 Victories with a American Pilot
Earn 50 Victories with a British Pilot
Earn 50 Victories with a French Pilot
Win an Offensive as the Americans
Win an Offensive as the French
Win the Campaign as the Germans
Win the Campaign as the Americans
Win the Campaign as the French
Earn 5,000 points with a American squadron
Earn 5,000 points with a French squadron
Earn 10,000 points with a American squadron
Earn 10,000 points with a French squadron
Earn 15,000 points with a German squadron
Earn 15,000 points with a American squadron
Earn 15,000 points with a French squadron
Earn 50,000 points with a American squadron
Earn 50,000 points with a French squadron
Earn 100,000 points with a German squadron
Earn 100,000 points with a American squadron
Earn 100,000 points with a French squadron
Earn 150,000 points with a German squadron
Earn 150,000 points with a American squadron
Earn 150,000 points with a British squadron
Earn 150,000 points with a French squadron
Win a Mission at Legend difficulty level
Shoot down 3 planes with 1 pilot in 1 mission: Rookie
Shoot down 3 planes with 1 pilot in 1 mission: Pilot
Shoot down 3 planes with 1 pilot in 1 mission: Legend