ChäoS;HEAd is a 2008 visual novel by 5pb. and Nitroplus, set in the same universe as Steins;Gate and Robotics;Notes. Also adapted into an Autumn 2008 anime by Madhouse, Inc. and later completed as ChäoS;HEAd NoAH in 2009. It was followed in 2010 by the sequel Chaos;Head Love Chu Chu!.
