Full list of all 50 Battlefleet Gothic: Armada achievements.
The base game contains 38 achievements, and there are 2 DLC packs containing 12 achievements.
Finish Chapter 3
Have a Level 8 Imperium Admiral in any game mode
Reach the maximal admiral level in campaign mode
Destroy the "Terminus Est"
Win an alliance mission with the Adeptus Mechanicus
Win an alliance mission with the Space Marines
Win an alliance mission with the Imperial Navy
Win an alliance mission with the Inquisition
Finish Chapter 2
Do not let the enemy aquire the Artifacts
Finish Chapter 1
Finish the Prologue
Finish Chapter 4
Finish Chapter 5
Find unexpected help to win the war
Exterminate the Eldar
Exterminate the Orks
Destroy the "Eternity of pain"
Destroy the "Sword of Sacrilege"
Destroy the "Torment"
Destroy Nemesises before the final battles
Get rid of the heresy in a most definitive manner
The Eldar Prince is dead
Don't lose an esteemed officer
Right your wrongs
Be sure to keep any advantage possible
Have a Level 8 Chaos Admiral in any game mode
Have a Level 8 Ork Admiral in any game mode
Have a Level 8 Eldar Admiral in any game mode
Have a Level 10 Light Cruiser Captain
Have a Level 10 Cruiser Captain
Have a Level 10 Battle Cruiser Captain
Have a Level 10 Battleship Captain
Reach Rank 1 in Elite Mode
Reach Rank 10 in Elite Mode
Reach Rank 30 in Elite Mode
Reach Rank 60 in Elite Mode
Reach Rank 100 in Elite Mode
Have all the Masters in a single Space Marines Fleet
Have a Level 8 Admiral with an Ultramarines Fleet
Have a Level 8 Admiral with a Blood Angels Fleet
Have a Level 8 Admiral with a Dark Angels Fleet
Have a Level 8 Admiral with a Space Wolves Fleet
Have a Level 8 Admiral with an Imperial Fists Fleet
Have a Level 8 Admiral with all the Space Marines Chapters
Have a Level 8 Admiral with a Tau Fleet
Earn 10 victories by using the Kauyon Tau warfare
Earn 10 victories by using the Mont'Ka Tau warfare
Have an Auxiliary ship at its maximum level
Win a victory against the Tau Empire while playing a Tau Admiral