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