Here is the full list of all 25 The Fifth Horseman achievements.
Start the game with 9 wisdom points.
Start the game with 9 endurance points.
Achieve the Bane status.
You've seen the fourth ending.
Have 14 or more dexterity points.
Complete the Golden Crown event.
Start the game with 9 dexterity points.
Start the game with 9 strength points.
You've seen the third ending.
Read the mysterious letter.
Have 14 or more strength points.
Have 14 or more wisdom points.
Have 14 or more endurance points.
You've seen the second ending.
Achieve the Pure status.
Complete The Rescue event.
You've seen the first ending.
Win the fight against the Horseman of Death.
Finish the game for the first time.
Win the fight against the Horseman of War.
Win the fight against the Horseman of Pestilence.
Win the fight against the Horseman of Famine.
Die for the first time.
Kill the old lady in the castle.
Start your first game.