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, they can be viewed 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 when you return 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. Sniper Wolf's face will appear in the corner.