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