Here is the full list of all 18 Queen of Thieves achievements.
Earn 50.000 gold
Romance Fredrick with Thalia
Romance Melvin with Joanne
Romance Mary-Ann with Thalia
See Arianna in Sexy Outfit!
Romance Tiberius with Kira
Romance Therjalla with Thalia
Romance Moirgane with Kira
Romance Fredrick with Kira
Romance Tiberius with Joanne
Romance Melvin with Thalia
Romance Mary-Ann with Kira
Romance Moirgane with Joanne
Romance Therjalla with Joanne
Defeat Raul
Defeat Raul Demon
Clear The Catacombs Of Undead
Finish Game in Visual Novel Mode