Here is the full list of all 14 Edgar achievements.
Get through the pit to the Raven's Woods.
Get through Raven's Woods to the Cellar of the Masque.
Get through the Cellar of the Masque to the Telltale Heart.
Get through the domain of the Telltale Heart to the Island of the Fay.
Get through the Island of The Fay to the Balloon Hoax.
Get past the Balloon Hoax to the House of Usher.
Get through the House of Usher.
Get spiked at least once!
Get to the checkpoint.
Use a lever.
Obtain the Rapier.
Reach the final level!
Get your first bit of love.
It only gets harder from here.