“It seems the theme of this title is ‘rebirth,’” Tetsuya Nomura wrote on Twitter. Aya’s overdive ability allows her to take over the body and consciousness of other people. When she transforms into another character Aya is reborn. “This is the a new parasite,” Nomura clarifies.
Director Hajime Tabata discussed the game’s difficulty levels. The 3rd Birthday has an easy mode for players who aren’t skilled at action games and a hard mode designed for 3D shooter experts.