Here is the full list of all 13 The Lords of the Earth Flame achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Take the crown
Finish the game of death.
Take the ruby
Romance with Gerda
Help the wounded
Open glossary.
View a map of the World.
Finish the game without dying.
Open comic ending of the game.
Finish the game.
Select the alchemist
Take the knife
Starting a game for the first time.