Another Side, Another Story: The main protagonists Yuito and Kasane both follow the same story, but from different perspectives.Many of these were actual animals being exposed to Other Particles from the Extinction Belt.
The true origin of the Other Particles remains unknown by the end of the game, though Yuito does resolve to find a way to permanently cure them.Some unlockables are locked behind codes that can only be found hidden in the anime. All the Worlds are a Stage: The final Phase of the game has you enter Karen's Brain Field, which incorporates pieces of all previous levels you have visited.After the End: Most of the human race evacuated to the Moon due to changes in the environment that made living on Earth next to impossible before the game started.Action Commands: Certain moves can be further augmented with unique button and analog motion prompts.