While playing through a dead ghost collection walkthrough. It was noticed that a few ghosts are either not appearing, or able to pick up. I verified this myself. So far the ghosts that are glitched was: [/spoiler] #1: On Earth. On a wrecked ship near the far North East End of the map. Forgive my broad description as to where the location is. #2: On Mars. Inside the subway system where your flashlight is active, on top of the TV mounted to the wall.[/spoiler] I cannot obtain either of these ghosts.