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