Appears to be the cheapest price out there right now. The game is out 14th January 2010.
"Ghost Trick: Phantom Detective is a story driven puzzle game where the player controls the ghost of the recently deceased protagonist to try to find out who murdered him; he has limited time as when the sunrises on the following morning he will cease to exist.
The game starts with the death of the protagonist, Sissel, who has lost his memory and has no idea who he is. The player then controls his soul to possess various unanimated objects to travel to various locations and eavesdrop on conversations of living people around him to gain clues about his missing identity and who murdered him.
Sissel can only travel a limited distance between objects, and possess selected items that have a “core”. Certain objects allow him to perform “Ghost Tricks”, where Sissel can use the “powers of the dead” to interact with the object, for example flip a switch or to open a door.
The player can travel to different locations of the city in which the story takes place by possessing telephones and “calling” the desired destination. Sissel cannot take control of living beings or dead bodies, however he can communicate with the souls of the recently deceased and witness the four minutes leading to the death, he can also act in those four minutes to try to change their fate.
The gameplay is puzzle based, but there are elements of timing and precision required. The player must perform Ghost Tricks on different items in the proper order and timing to affect what is happening in a scene. Another big part of the game mechanics consists of witnessing murders and the events leading to them and then trying to find an alternative chain of events that leads to a different outcome."