Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Ace Encounter	Encounter an Enemy Ace.
Ace in the Hole	Defeat an Enemy Ace.
Ace of Aces	Defeat all Enemy Aces (in one campaign)
Bail Out!	Bail out your entire crew.
Bomber Crew	Complete the first mission.
Double Qualified	Fully level up a crew member in two skills.
Experienced	Fly 25 missions.
Fifty Fighters	Destroy 50 enemy fighters.
Fifty Fighters Five Times	Destroy 250 enemy fighters.
Focused Four	Use 'focus' on all 4 gunner stations at once.
Four of a kind	Defeat 4 Enemy Aces (in one campaign)
Grand Slam	Destroy a target using the Grand Slam bomb.
Mission Success	Return to the airbase having successfully bombed all targets.
One Engine	Land at the airbase with only one working engine.
Photographer	Take a photo of an intel site.
Qualified	Fully level up a crew member.
Rookie	Fly 10 missions.
Running On Fumes	Complete a mission and land at the airbase with less than 5% fuel remaining.
Seven Survive Seven	Complete 7 missions with the same 7 crew surviving.
Seven Survive Success	Complete a successful mission with all 7 crew surviving.
Sinking Feeling	Sink 5 Submarines.
Skeleton Crew	Complete a mission and land at the airbase with 2 or fewer crew members surviving.
Target Destroyed	Destroy an enemy target.
The Bunker	Unknown.
Tour Of Duty	Have one of your crew survive 30 missions.
Twenty Targets	Destroy 20 enemy targets.
Two hundred Targets	Destroy 200 enemy targets.
V1 Destroyer	Shoot down a V1 Rocket.
Veteran	Fly 40 missions.
Winging it	Repair an engine mid-flight.