Here is an overview of the game, via Nintendo.com:
A journey into myth and madness
From the makers of Heavenly Sword, Enslaved: Odyssey to the West, and DmC Devil May Cry comes a warrior’s brutal journey into myth and madness.
Set in the Viking age, a broken Celtic warrior embarks on a haunting vision quest into Viking Hell to fight for the soul of her dead lover.
Created in collaboration with neuroscientists and people who experience psychosis, Hellblade: Senua’s Sacrifice will pull you deep into Senua’s mind.