Amnesia 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. They were later combined for a PlayStation Vita release titled "Amnesia Later x Crowd V Edition" in October 2014. A Nintendo Switch port of Amnesia: Memories and Amnesia: Later×Crowd was globally released on September 20, 2022. Due to its positive reception in Japan, it produced various related merchandise such as drama CDs, character music CDs and books. A 2013 anime television series has been produced by Brain's Base.