Here is the full list of all 29 INMOST achievements.
Gain all the achievements.
Listen to all the rabbit's comments.
Talk to the cats when their sibling is alive.
Zero deaths as the wanderer.
Play without collecting any pain.
Save the cat from the hunter
Kill all jumpers.
Complete the Slime Pit scene without taking damage.
Complete the swamp scene without taking damage.
Complete the fire scene without taking damage.
Complete the castle scene without taking damage.
Find all the notes.
Collect all the Pain Crystals.
Finish the final scene.
Complete the Snow scene without taking damage.
Kill all enemies as the Knight.
Discover what's in the attic.
Discover the fountain.
Talk to the cats when their sibling is dead.
Listen to all the Storyteller's tales.
Host a Tea Party!
Get the Cookies.
Enter the mines.
Find the rabbit.
Listen to the Storyteller's first tale.
Defeat the first hunter.
Finish the Old Man Scene
Find a hidden Pain Crystal
Finish the Girl Scene