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