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