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