Here is the full list of all 12 Lovingly Evil achievements.
Get Satan's Found Family ending
Get a phone number from all 5 love interests
Finish the game with as little interaction with characters as possible
Get the clone's good ending
Get the vampire's romantic ending
Get Satan's Ghosts of the Past -ending.
Get the vampire's friendship ending
Get the vampire's seductive ending
Become a vampire
Get the stepmother's Banishment ending
Get the stepmother's Bad Apple ending
Get the AI's good ending