Here is the full list of all 11 King of Queendoms achievements.
Start the game
Refused to take the oath
Proved how bad you are in bed.
Gave Elivira some sausage for breakfast
Sign Mathilda to treaty
Facilitated the orange deal
Failed to sign Mathilda to treaty.
Failed to sign Liliana
Sign Liliana to treaty
Peace throughout the land
Elvira falls in love with you