-Equip the Sorrow Doll and have the camera from the Nomad. You can use that camera to find thirty ghosts in Shadow Moses. After taking pictures of them, you can view them in the photo album with a new option. Note: The doll is only needed to see the ghosts prior to taking the photographs.
-In Shadow Moses, after returning to Otacon's office to shut down security and turn on the power, take a photograph of the area to the left of the Policenauts poster. When viewed you will see a superimposed image of Hideo Kojima's face.
-Take a picture of the wolves after the Crying Wolf battle to see Sniper Wolf's face in the corner.