Steins;Gate 0 is an upcoming sequel to Steins;Gate by 5pb. and Mages, and the developers have announced that the game will release in Japan sometime in Fall 2015 for PlayStation 4, PlayStation 3, and PlayStation Vita.
As previously reported, 5pb. founder Chiyomaru Shikura is in charge of the plannint for Steins;Gate 0, alongside Tatsuya Matsubara as the producer, and character designs by huke and music by Take Abo.
The game will also get a drama CD, light novels, and an anime for the sequel, which will be revealed in the near future.