Here is the full list of all 25 Haimrik achievements.
Don't kill any shadow clone.
Kill the ogre with your sword.
Do not kill any archers inside the dream.
FInish the game.
All nightmare long.
Survive the first fight against the snake without taking damage.
Kill the guard using the portcullis.
Kill 20 guards using the wand.
Push Ice to fire to melt it.
Survive Witter's boss fight.
Get all the items of the highborn outfit.
Get all the color combinations to the outfit.
Kill the three bandits with only 1 machine.
Defeat algernon.
Find all the ways to poison the jester.
Defeat the goblins.
Enter the caves.
Build the cage and lock Masamba.
Destroy the boulder with the pickaxe.
Feed the snake to the crocodile.
Defeat Murdock The Revenant without using chandeliers.
Defeat Both phases of Murdock.
Defeat Murdock without using any torches.
Kill all the soldiers in a level without using gunpowder.
Finishing the dream.