Here is the full list of all 121 The Madness of Little Emma achievements.
Reach The Riddle
Get very lucky
Find a red chest
Buy 5 items in one playthrough
Kill 4 Seasons
Kill Summer
Kill Autumn
Kill Winter
Get very unlucky
Kill Spring
Unlock first ending
Kill Manless Face
Have only 1 heart container
Unlock Lucretia
Destroy a turnip
Reach Undergrounds
Get really insane!
Kill Sinister Mask
Reach Misery
Kill all bosses in episode 2
Kill Alice
Kill Red Viper
Kill the fat man
Unlock Amelia
Find Love Burrow
Kill all bosses in episode 1
Find a secret
Collect 5 health bonuses in one game
Kill Haunt
Unlock Elizabeth
Kill Entozoon
Reach Den
Kill Mask
Kill Liquid Sisters
Die
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 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 Eidolon
Kill Spirit
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