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