Uncharted 4: A Thief’s End: I Thought I Heard Something

Uncharted 4: A Thief’s End™
I Thought I Heard Something (BRONZE)
Perform 30 vertical stealth takedowns #PlayStationTrophy

A vertical stealth takedown requires you to be hanging above an enemy that is unaware of your presence and then go on to take him down from above with Circle.
You may not get this trophy through regular play, if not then go to the Bridge from Chapter 8 via encounter select on explorer difficulty and press Circle to do a vertical takedown. Restart the checkpoint and repeat another 29 times to get the trophy.