Full list of all 51 303 Squadron: Battle of Britain achievements.
The base game contains 48 achievements, and there is 1 DLC pack containing 3 achievements.
Finish the game
Finish the game without visiting the Mechanic (except tutorial)
Finish each mission in Realistic Mode
Finish each mission with a highest score
Finish eachmission on the highest difficulty settings
Shoot down the enmy in Tutorial
Shoot down your first foe
Unlock the Spitfire
Read the Zumbach's prologue
Finish the first week
Finish the second week
Finish the third week
Finish the fourth week
Finish the fifth week
Shoot down 20 of each enemy plane type
Finish a mission without sustaining any damage
Shoot down the enemy craft with disabled engine
Shoot down the enemy craft with that one last bullet
Shoot down 8 enemy planes without reloading
Shoot down all bombers by yourself in any mission
Shoot down the enemy plane while diving sharply
Shoot down the enemy plane while climbing steeply
Shoot down the enemy plane while flying head-on
Boil the engine
Shoot down a retreating enemy aircraft
Ram the enemy
Shoot down 5 enemies during one sortie
Finish a mission in a Realistic Mode
Shoot down the spy plane in "Good Morning, General!"
Protect Major Kellet during "The Baptism of Fire"
Reach the max possible altitude
Have every conversation possible
Do a 360 degree jum on bicycle
Achieve a 50km total distance of bicycle rides
Achieve a 10km total distance of running at Station
Ring your bicycle bell at 10 people
Pay your respects to the King
Pay your respects to the Flag
Keep on running with the soldiers
Keep cycling with the running soldiers
Shoot down 100 enemy planes
Shoot down 25 enemy planes with KillCam
Use the Mechanic Mode 20 times
Gather 20 bottles of Whisky
Pick 100 mushrooms
Eat a carrot
Read all the scribblings scattered throughout RAF Northolt
Finish a custom mission in a Spitfire
Master your shooting range skills
Get top score at 75m target
Beat 4 seconds in a shooting range challenge