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