Here is the full list of all 32 The Count Lucanor achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Guess the kobold's name using the letters.
Feed the worm from the depths.
Catch the butterfly in the depths.
Discover the truth in the throne hall.
Find the hidden treasure of the Count.
Get the treasure hunter badge from Giulia.
Catch Eisbein.
Open the garden chest.
Find J.F.'s most important note.
Enter the fire room from a secondary door.
Use the snake ring at the best place.
Kill the old woman and Eisbein.
Guess the kobold's name without using the letters.
Get the fire room letter without using the bucket of water.
Find some stale bread before night falls.
Find the chest hidden near your house.
Find the castle's wall at day.