Here is the full list of all 22 Morkredd achievements worth 1,000 gamerscore. It takes around 6-8 hours to unlock all of the achievements on Xbox One.
Made noise with all the wind chimes
Completed the whole game without dying
Finished the game within 120 minutes
Completed the game alone
Completed The Meat without dying
Found all the hidden murals
Found a mural in The Meat
Popped 50 pimples in The Meat
Completed The Temple without dying
Found a mural in The Temple
Completed The Mountain without dying
Completed the game with a friend
Disturbed all the legs
Found a mural in The Mountain
Found a mural in The River
Completed The Sewer without dying
Found a mural in The Sewer
Squished all the worms
Completed The Prologue without dying
Completed The River without dying
Got killed by a shadow
Started a co-op game