It just happened to me about 2 weeks ago and my first reaction was, You have got to be f***ing kidding me. I currently waiting for MS to send it back.

I'm playing the darkness and i'm at the part where you kill Duval's crazy brother. I'm still in the chamber where you kill him and get the black hole power but the door with the bars won't open. I used the black hole like it said. Please help

While playing I passed a couple of collectables. Can you go back and get them without starting a new game?