Director Hajime Tabata reflected about the development of The 3rd Birthday in a creator’s blog post. Three years after the original announcement and eleven years after Parasite Eve 2, The 3rd Birthday is finally out in Japan. Tabata thanked fans for waiting so long for the game.
When the project started Tetsuya Nomura gave him three keywords: Aya Brea, Overdive, and Twisted. Yoshinori Kitase, producer, gave Tabata a development team and said, "make a game connected to the next title." With those directions, Tabata aimed at creating the best gun shooting game for PSP. Everyone on the development team exhausted all of their energy making the game. He hopes ten years later people will still have memories of The 3rd Birthday.
Tabata closed by saying, "If the 3rd [Birthday] rises to popularity we’ll make the 4th."