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 (franchise) although in certain titles elements such as falls cannot do this, and instead just leave the fighter with very low health. Since "Dead or Alive 2", the series has implemented its tag team fighting system, allowing characters to switch back and forth for combo attacks and even attack simultaneously when timed correctly. The tag mode also included special throws unique to certain pairs of characters and allows for the participation of four players, something not common in the genre. "Dead or Alive 3" introduced Attack Change, a new tag system feature where the fighting character can switch places with a