The Coming of the Quantum Cats can - given different social conditions - develop completely different character traits (timid or assertive, benevolent or predatory, etc.) The title refers to the famous thought-experiment known as "Schrödinger's Cat", where the outcome of a real-world event depends on a quantum event. By some interpretations, the real-world object, in this case a cat, must be in two states simultaneously until it is observed. However, the story is more closely related to the many-worlds interpretation of quantum mechanics where all possible outcomes of an event occur, each in its own parallel universe. The same concept was treated, somewhat more pessimistically, in
Dead or Alive Ultimate to be released in America and Europe ("" having been the first) and the first online console 3D fighting game in Japan. The system set forth by Tecmo for online play in "Dead or Alive Ultimate" was intended to recreate the feel of playing at an arcade. Players would log onto a shared "lobby" and then observe other matches until it was their turn to participate. Each lobby has a set of gameplay parameters that is determined by its creator, allowing for tournament-style play. While this game brings back the old mechanics of the Dreamcast version of "Dead or Alive