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