Obtain all other achievements in the game.
Finished the Tutorial.
Gain access to the Forest.
Gain access to the Cemetery.
Unlocked a member of the Slayers.
Unlocked half of the members of the Slayers.
Unlocked all of the members of the Slayers.
Kill 250 monsters.
Kill 500 monsters.
Kill 1,000 monsters.
Kill 206 Skeletons -- one for each bone in the human body!
Kill 280 Zombies.
Bust 100 Ghosts.
Killed 100 Clowns.
Killed 50 Gargoyles.
Defeated the Vampire.
Defeat the Pumpkin King.
Complete a quest with a full, three-character party of costumed characters.
It might be achieved if you, the master of unlocking, force 200 doors open.
Complete 35 different cases.
Complete a seasonal case.