The movie/book "Christine - by Stephen King" Got me thinking about a game where you play an evil spirit that can only inhabit machines. The player most kill people to feed on souls and is being hunted by a demon hunter. The hunter tries to trap the player in one machine and destroy him. The players powers are based on a soul-level like magic points including the ability to hope machines. Get enough power and free yourself from the curse that trapped you in machines.

Ok it's a goofy idea but it was fun to play with in my mind for a little bit.