Canadian filmmaker David Cronenberg, who has long been fascinated by the ways new technology shapes and manipulates the human beings who believe they are its masters, is in familiar territory with eXistenZ, a futuristic thriller that combines elements of science fiction, horror and action-adventure. What is eXistenZ? According to the glossary Cronenberg put together for this film, it is a new organic game system that, when downloaded into humans, accesses their central nervous system, transporting them on a wild ride in and out of reality. What’s more, it changes every time it is played, by adapting to the individual user — you have to play the game to find out why you are playing the game. More than one person can plug into the same game and set out on a series of bizarre and surrealistic adventures together.