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
Romance with Gerda
Open comic ending of the game.
Take the knife
Select the alchemist
Take the ruby
Finish the game of death.
Help the wounded
Finish the game.
Finish the game without dying.
Starting a game for the first time.
Open glossary.
View a map of the World.