Here is the full list of all 24 N.E.R.O.: Nothing Ever Remains Obscure achievements worth 1,000 gamerscore.
Solve the first puzzle.
See no evil, hear no evil, speak no evil.
Become a light unto yourself
Go on sweetie, run to your father.
Exit the caves.
Find a way to cross the canyon.
Gain access to the large staircase.
Exit the basement.
Follow the light.
Lunch is serverd on Thursday.
A fragment of a memory.
Six fragments of a memory.
A completed memento in the caves.
Six fragments of memory.
A completed memento in the forest.
A completed memento in the hospital.
A completed memento in the desert.
The pictures are complete.
No puzzle left undone.
All the grids are blue now.
Exit the forest.
Climb to the top.