A 2012 visual novel by 5pb. and Nitroplus, set in the same universe as Chaos;Head and Steins;Gate. Also adapted into an Autumn 2012 anime by Production I.G, a 2012-current manga in Mag Garden's Monthly Comic Blade by Asakawa Keiji, and a second 2012 manga by Shihira Tatsuya, Robotics;Notes / Frau Side, serialized in Shueisha's Ultra Jump.
