Hidden Object scenes are those that task you with gathering a list of items from a mess of junk. There are several of these scene throughout the game, the first of which is inside the helicopter after giving Hawk the medkit. You need to repeatedly tap the screen on objects that are not on the list which causes the screen to get a broken likeness. Do this three times total in a single scene to unlock this achievement. This is only missable in the sense that if you don't do it in your playthrough, you will have to delete your first save and start a new one for about 2 minutes.