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