I was a victim too. But yesterday, after a week I got the trophy and Platin. Yesterday I found out, after you take the red elevator down into the Abyss where the trophy should pop, you can quit to the main menu (press start) if the trophy won't pop. If you resume your game from the main menu you start at the first elevator going up. So walk a few steps, fall down to the red elevator, step on it to go down and hope for the trophy. I didn't step out of the red elevator at the Abyss, just went to main menu and tried again. It's a fast method. It took me five tries to pop the trophy. After three tries I quite the game and start it again. Hope that helps.