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