Here is the full list of all 121 The Madness of Little Emma achievements.
Unlock Chloe
Complete Arena
Complete Arena as Elizabeth
Kill Summer
Get very lucky
Kill Winter
Unlock first ending
Kill Sinister Mask
Get really insane!
Unlock Lucretia
Kill Autumn
Get very unlucky
Buy 5 items in one playthrough
Kill all bosses in episode 2
Kill the fat man
Have only 1 heart container
Unlock Amelia
Find Love Burrow
Reach Misery
Kill Entozoon
Kill Alice
Find a red chest
Kill all bosses in episode 1
Kill Mask
Kill Green Viper
Find a secret
Unlock Elizabeth
Collect 5 health bonuses in one game
Destroy a turnip
Kill Liquid Sisters
Reach Undergrounds
Kill Red Viper
Reach Den
Kill a boss
Kill Haunt
Die
Reach The Riddle
Unlock second ending
Unlock third ending
Unlock final ending
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
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 Meat Bag
Kill Manless Face
Kill Eidolon
Kill Spirit
Kill Spring
Find all Love Items
Unlock fifth ending
Unlock sixth ending
Kill Manless Face as Amelia
Unlock Marah
Complete Arena as Emma
Complete Arena as Lucretia
Complete Arena as Amelia
Complete Arena as Marah
Complete Arena as Chloe