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