Hellblade tells the story of Senua, a Celtic warrior as she travels through "hell." Senua's hell is a manefestation of her mental illness filled with hallucinations and delusions. Players will battle through manefestations of anxiety and depression with Senua, and see the world through her eyes.
In order to get the portrayal of mental illness right, the development team at Ninja Theory has enlisted the help of a professor of Health Neuroscience at Cambridge and has found the support of Wellcome Trust, a foundation aiming to teach and support understanding of mental health issues around the world. They've consulted with experts and people who have experienced the issues they're trying to portray to create a portrayal they describe as "accurate and sensitive."
Hellblade will be released on PS4 some time next year.