Here is the full list of all 14 The Search For Paradisus achievements.
Interacting with "Mr. Nobody".
Collected 20 "Hopes"!
Lose some of your sanity.
Get to the third area!
Interact with the soul without an arm!
Got caught by a tracker!
Escape from "Purgatorium"!
Interact with "Mr. Nobody" in "Gehenna".
Got hit once by the tornado in "Gehenna".
Escape from "Gehenna"!
Interact with "Mr. Nobody" in "Paradisus".
Interact with the "Lost Soul" on top of "Paradisus"!
Complete The Search For Paradisus!
Escape from "Paradisus"!