Here is the full list of all 121 The Madness of Little Emma achievements.
Get very lucky
Kill Eidolon
Reach The Riddle
Kill 4 Seasons
Kill Winter
Kill Spring
Kill Summer
Kill Autumn
Unlock first ending
Kill all bosses in episode 3
Kill Manless Face
Get really insane!
Kill Sinister Mask
Kill all bosses in episode 2
Kill the fat man
Unlock Lucretia
Unlock Amelia
Kill Meat Bag
Buy 5 items in one playthrough
Kill Alice
Reach Undergrounds
Reach Misery
Kill Entozoon
Kill Red Viper
Find a red chest
Have only 1 heart container
Destroy a turnip
Collect 5 health bonuses in one game
Get very unlucky
Kill Green Viper
Kill all bosses in episode 1
Unlock Elizabeth
Find Love Burrow
Kill Mask
Reach Den
Find a secret
Kill Haunt
Kill a boss
Kill Liquid Sisters
Die
Unlock second ending
Unlock third ending
Unlock final ending
Kill all bosses in episode 4
Kill April
Find everything
Complete ending 4 with clean mind all the time
Unlock every other achievement
Complete episode 1 without collecting hearts and healing herbs
Complete episode 2 without collecting hearts and healing herbs
Complete episode 3 without collecting hearts and healing herbs
Complete episode 4 without collecting hearts and healing herbs
Kill a shopkeeper
Kill Spirit
Find all Love Items
Unlock fifth ending
Unlock sixth ending
Kill Manless Face as Amelia
Unlock Marah
Unlock Chloe
Complete Arena as Emma
Complete Arena
Complete Arena as Lucretia
Complete Arena as Elizabeth
Complete Arena as Amelia
Complete Arena as Marah
Complete Arena as Chloe