dehersh145,055 Locked 04 Sep 2013 28 Jul 2015
This trophy is unlocked by clearing the Underground Passage chapter without getting spotted by the guardians.
The easiest way to avoid the guardians in this chapter is to stick to the left side of the passage. As long as you remain close to the wall the guardians shouldn't bother you. Once you activate the meditation circle at the end of the chapter the trophy should pop.
**Update for PS4 version**
Courtesy of benh57 in the comments. If you are playing the PS4 version of the game you may need to wait until after you exit the final chamber before the trophy will pop.
Hopefully this helps and have fun!