The press release describes the game best.
Project Zero 2: Wii Edition "...sees you take on the role of Mio as she explores a mysterious cursed village with her twin sister Mayu. When Mayu follows a Crimson Butterfly deep into the woods, Mio has no choice but to follow when eventually they stumble across the seemingly abandoned village. Only by helping the girls to uncover the secrets of an ancient ritual and the abandoned village, now permanently shrouded in an eerie darkness, can you hope to escape its grasp.
As you explore the dark and foreboding village it becomes apparent that you are not alone and the Twins are attacked by the ghosts of the former inhabitants. The spirits that haunt the village can once again only be defeated by using the Camera Obscura, a mythical weapon that allows you to interact with the spirit world. Whenever there is a ghost nearby you will see an indicator at the top of the screen showing how close it is to you; red indicates an evil spirit and blue that the spirit is good or non-offensive. Watch out because they could be behind you waiting to attack!
To cause more damage to the evil spirits lurking in the darkness make sure that they are right in front of you and the damage gauge is charged as much as possible before you shoot. Trying to pre-empt an attack is a great way to cause even more damage and stop the ghost from attacking you. By timing your shot with the Camera Obscura to hit when the viewfinder becomes red, you earn a bonus and deal out more damage. You can also gain more bonus points for taking multiple ghosts with the same shot."
Press Release
