Here is the full list of all 44 Darkestville Castle achievements.
Finish the prelude.
Finish The First Chapter.
Finish The Second Chapter.
Finish The Interlude.
Finish The Third Chapter.
Finish The Game.
Use the hint option for a fist time.
Talk through every dialogue option with Dan.
Try to find a secret safe behind every picture in Darkestville.
Fix the broken machine in the basement.
Poke around in every trashcan in Darkestville.
Have a look at every single person in Darkestville.
Have a look at every tombstone in Darkestville.
Give some sedative to Walrus.
Get the second key.
Ask all three of Romero brothers about Dan.
Try to flirt with Foxy.
Get all 3 keys.
Get out of the castle cell.
Talk with Jeff about Good stuff.
Get a tomato and talk through every dialogue option with Vegetable Demon.
Have a look at every demon in Darkestville.
Talk through every dialogue option with Werewolf by the tavern.
Talk with Pig Demon about joining Demon Trade Union.
Talk through every dialogue option with Fly.
Read the whole biology textbook.
Win at dice with sugar cubes.
Talk with Giovanny in the Tavern about T.Rex.
Talk with Sailor Demon about his… ship and find a way to get it from him.
Get Walrus his coffee.
Cure both Mongoose and Walrus.
Fulfil every strike demand of Pig Demon.
Solve the Underworld Gateway puzzle.
Try all possible Underworld Gateway password combinations.
Meet Alberto.
Read the Survivalist Magazine.
Buy video recorder back.
Try every drink at the bar and find 3 diamonds.
Build a bridge over the Lavafall.
Find a secret entrance at the Lavafall.
Read the whole book about ghosts.
Summon the ghost and talk through every dialogue option with him.
Find a message from Cid’s parents and get the detonator.
Run into Vigo for three times.