2 people have reported this achievement becomes unobtainable after opening the last door. Make sure to do it before to avoid any possible issues.
You can get this in chapter 6 by arranging the constellation in a certain way. When looking at the last Door, having the entrance behind you the far left disc is 1, and the far-right disc is 4
Disc 1: no symbol
Disc 2: left most symbol
Disc 3: topmost symbol
Disc 4: no symbol