Here is the full list of all 29 DE-EXIT - there are Eternal Matters achievements.
You completed the Prolog.
You completed Chapter 1
You completed Chapter 2
You completed Chapter 3
You completed Chapter 4
You completed Chapter 5
You completed Chapter 6
You managed to sneak away from the enemies in the Prolog without being caught.
You solved the priest puzzle.
You didn't die during the chase of Chapter 2.
You didn't die during the boss fight of Chapter 3.
You completed the puzzle within a limited time frame.
You activated all the panels in the temple entrance of chapter 5 without touching the snowy ground.
You didn't collide with anything while driving the boat.
You found one soul fragment.
You found all soul fragments.
You've equipped your first piece of the Guardian armor.
You've equipped the full Guardian armor.
You read one lore point.
You read all the books in the library.
You found the mural in High Priest Myriel's room in the Prolog.
You talked to all possible characters in the Nexus.
You've been bitten by an eel.
You've eaten each of the colored fruits.
You've used the helmet inside the mine.
You interacted with the fox.
You found the campfire and interacted with it.
You found a fallen Guardian.
You found all fallen Guardians.