Amnesia (アムネシア Amuneshia) is a Japanese visual novel series by Idea Factory. It was first released in August 2011 for PlayStation Portable, and then a fan disc in Japan Amnesia Later was released in March 2012. Another sequel titled Amnesia Crowd was released in April 2013. The series is well received in Japan, so it has a lot of related merchandise released, such as Drama CDs, Character music CDs, books, etc. An 2013 anime television series has been produced by Brain's Base.