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