Here is the full list of all 15 Last Night of Winter achievements worth 1,000 gamerscore.
Drink some water from the bottle.
Explore the depths of the prison.
Escape the prison.
Pet the dog.
Forget your differences and pet the cat.
Kindly decline the waiter's offer.
Find the cat.
Buy an upgrade in the blacksmith.
Pass through the guardian of the garden.
Beat one of the Royal Guards.
Don't let the fish eats you.
Return the quietness to the library.
Give four ores to the blacksmith.
Shave the wise man's beard.
Beat the game in hard difficulty from the start to finish.