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