Fate/hollow ataraxia (Japanese: フェイト/ホロウアタラクシア, Hepburn: Feito/horō atarakushia) is a 2005 PC visual novel video game developed by Type-Moon, and the sequel to Fate/stay night.

After one of her experiments changes time and space, Rin Tohsaka leaves for the Mages' Association in England to fix things.

Shirou, as a precaution, sets off to ensure nobody is in danger and instead finds himself frequently meeting a mysterious girl, Caren Ortensia.

Determined to end the loop, Bazett, Avenger, and Shirou fight to discover the truth behind what is causing the endless four days.

A soundtrack to the game, entitled Fate/hollow ataraxia Original Sound Track was published by Geneon Entertainment on November 23, 2005.