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