Shadow Hearts Covenant is a role-playing video game developed for the PlayStation 2 and serves as a direct sequel to Shadow Hearts. Set during World War I, the narrative follows Karin Koenig, a German Army lieutenant. She aids Yuri Volte Hyuga, a man with the ability to transform into demons, and together they embark on a journey to free him from a malevolent curse while confronting forces of demonolatry.
Shadow Hearts: Covenant is a direct continuation of Shadow Hearts; Its story starts a year and a half after the first one in the midst of World War I. It focuses on Karin Koenig, a lieutenant in the German Army who assists in the exorcism of a man able to turn into demons, Yuri Volte Hyuga. However, after learning of Yuri's caring nature, Karin goes on a quest with him to save him from a spell inside him and are drawn into a conflict involving demons of demonolatry.